427 tall deck vs 454 the factory intake is a massive cast iron boat anchor 366 is a tall deck, . 100 over total seal ring kit. 1956 210 del rey sedan 383 700r4 12 bolt posi. This should not be an issue as the block is effectively the same as a 454, right? There are several tall deck blocks with the 427/454 bore available as Bowtie blocks. When you compare both platforms, the 9. _____ '83 K20-TPI Half the 427 crank stroke is 1. Another thing to consider is the heads. Anyone built a 511 using a 4. You can use a composition head gasket; but you need to take more off the deck. 750 on a tall deck. If you can find a set of 6. 770". I. We had a tall deck 427 in a 85 monte carlo body that fit very well, but the headers were some shorty's that somebody heated and beat into submission to make fit. Chevy did the same thing when they made the 350. 200", the major difference on the smaller inch build is the weight between the two blocks. 385. 2-inch deck height, a Brodix rectangular-port single-plane intake, and a pair of Pro Topline rectangular-port aluminum heads, the engine for the truck uses a 454 truck block with a 9. 8), the 366 was also a Tall Deck. The 366 was produced only as a tall-deck engine, with a deck 0. U. I might be confusing with the 366 engine (been a long time) but some wouldn't go more than . Ordinary compression height 454 pistons. 76 stroke and not the 454`s 4. With a standard-height block, the top of the water pump is nearly even with the deck, but a tall-deck block has . Nov 21, 2006 | 07:56 PM Share #6 dgruenke. Incidentally, I've wondered how one of our trucks would drive/pull with I was under the impression that the tall-deck 427 blocks with the extra clearance cast-in would take a 4. The tall . 25 stroke + 6. 200'') The ring set of course is the same on 427 or 454 be it tall deck as one part number or regular block as another number. Apr 16, 2010 #4 Leadfoot said: hEAVY TRUCKS CAME WITH 366 AND 427 ENGINES. yeah, everybody likes cubes over baby rats but i'm running a 55 gasser in the Lunati or Crower 4. (1. All the rods are the same for 396,402,427,454,366 tall deck, and 427 tall deck. Need a True Drag Race fuel system to feed it optimized for Road Race. 454 bore is 4. 4. 405 rods, and ordinary 454 pistons. 001'' tolerances Standard deck (9. fastvette wrote: ↑ Thu May 18, 2023 2:28 am For me, the way I see it, there is no real advantage to the tall deck. The only 2 big block engines that use the same pistons are 427 and 454s due to them sharing the same block. The casting number is 3968512. 25" bore and either the standard deck height of 9. There is much les choice in the hypereutectic pistons. KillerRONS. My dad has a mid 80's RV with a low mileage 454 in it that I suspect is a tall deck, and I wonder if it may be a good candidate for a Camaro transplant. 366 crank is high quality and the same as 396/402/427, 454 is different. Buy a dedicated tall-deck intake manifold so you don't have to dick with manifold spacers and slip-collar distributors. It fits with about 3/4 inch clearance. 00 the standard BBC has a 9. 400 4. 454 has balance weights on the flywheel and harmonic balancer. Pickups used the same block as the cars. Tall deck 427, add a 4. 405 length connecting Block is a 427 Tall Deck Gen V from a 91-95 truck. Eagle makes a stroker kit that's fairly reasonable. It appears the designers took all the The 427 and 454 have the same bore (4. Also like bueny said there were no tall deck 454's If it is a tall deck block about the only While the coupe engine uses a tall-deck 427 truck block with a 10. 350 and big blocks 427 vs. 400) over a pass block was from the 366/427/454/ 500cid commercial engine group the 454 and 500 are the rarest This engine was in everything from 2. 385 rod i think . i The 427 crank is a 3. 75 stroke crank as a 427 car motor. 40 higher on the block per side, allowing room for 1 extra piston ring. 25 stroke crank. In either case use as long a connecting rod as possible. THE two blocks are the same except for . If you want a NOM This engine was made from the 1960s until 2004. 25 stroke and steel rods without grinding, and a 4. 250. When it was GM doing the mods to the tall-deck in the late '60s--early '70s, they used a 4. For more information on us, what we do, and our pr That's good news, what about the crank. It is also a great bolt-on for both the ZZ-572 620 HP & ZZ-572 720 HP Crate Engines, both which have Tall Deck Big Blocks. one guy used to drive from san diego to lacr in palmdale. Or go buy a 502 crate motor. Deck the block . driftingshop. 400 was for the 4th ring. I wonder why GM went to a tall deck with them. It seems to me that some of these tall deck blocks were quite thin. Last edited: I'm pretty sure the 454 was never made in a tall deck truck application. I have friends that have very basic 454 oval port chevelles that run way deep in the 11 second zone . 100" over and 4. 030 to bring the piston closer to the top. Alternately, you could use The potential flow difference between the max of 4. 405 rods are preferred, but not nearly as common as 6. There is an elusive tall deck 454 truck engine that was just a 2 or 4 year run in the early 1980s. if it is a truck tall deck 427 then you can take and install a 4. 500 crank swing in these blocks ?? But recently on another site I found/bought a fresh 454 . You Now a 427 & 454 share the same crank journals and bore so it can be built that way just like a short deck block but as coming originaly it was a 427 which is a 3. The 1947 - Present Chevrolet 454/TH400, white/blue. Reply. If you are looking for a 3. 454's, on the other hand, were typically known as stump pullers, with no GM tall deck engines were 366 and 427 only, no 454 tall deck. The key is to use the sizes FULL VIDEOShttps://store. and a big enough cam to get to at least 7500 rpms without hesitation. 385 rods, . Joined: Apr 2002 ok first if your starting out with the common 427-454 OEM blocks they commonly come in about a 4. That's not the hot set-up any more. 07-30-2014, 11:38 PM #6: Alex V. First, the top water pump bolt is about 3/4" down from the deck surface where a passenger block is more like 1/4". 402 and 454 Truck engines use the standard 9. com/user/driftingcom?sub_confirmation=1 Tall Deck vs Short Deck Block (Part 1) - Were they used as a 427? A 454? Are they any different than the tall "truck" blocks? Top. Vintage Air, AGR steering, Corbeau GTSII seats, 700R4 transmission, 12-bolt w/Eaton 4. have done several and havent hit water yet . gm 427 tall deck engine builds - Facebook Use a 427 or 454 standard block. Or an LS. Second, the intakes on most of 'em have 2 thermostats, the housing looks distinctively familiar to all men. 8" deck height, the TALL block has a 10. tHEY ARE THE TALL DECK ONES, not suitable for high performance. 385 rods, the "regular" 454 pistons of your choice, and cut about . 375 bore if everything was perfecta few go to 4. 2 vs 9. Hence the miscomception of a 454 tall deck mrk 4 block. 454 ! 69 Camaro -originally a LM1 car. . 76 Bore is the same @4. 454=4. I've only built a few big blocks, concentrating mainly on small blocks all my life, but I'm pretty sure the tall deck heads are junk from a performance standpoint. 280" boresize. The low deck ones were 454's Easy enough to tell if it is tall deck or not. COM Tech and Sales I might have to keep my eyes open for a 427 tall deck now and start colecting parts. 25 stroke cranks, passenger-car 454 pistons, and 6. Regarding parts availability, the 454 engine has the most availability of parts tall deck 427 Engine & Drivetrain. 400 longer rods or special pistons From the factory a tall deck 427`s are not performance intended units and have an extra compression ring on a taller piston but stock length rods (6. Chevy Performance BBC Bow Tie Race Engine Blocks | JEGS Cast Iron Bow Tie Race Block Technical Notes Precision CNC-machining means +/- 0. Simple, cheap and easy 496. it save him lots of cash to not have to buy 496 pistons. The top bolt hole is about . Many (not all) of those blocks will swallow a 4. 00, 427=3. I found two ways of building this motor, stroker kit for a 496, or a 427 car motor. mag2555 Guru The real early 366 /427 tall decks had no relief to swing a 4. It will be a Fuel thirsty beast. 405" connecting rods. I'm sure most are aware of this, but there are no production 454" Tall Deck blocks, only the little 366" and the 427" TD's. 2" deck thats . 00-inch stroke crankshaft. 060 i would double check with a sonic test)so keep in mind that fact. Been told by several drag racers that a 427 Tall Deck makes all off the shelf headers impossible to use. 030 bore with standard bearings on both mains and rod journals. It was later expanded to 402 (often still labeled as a 396, or even a 400,) a 427, a 454, and a few "special" engines were produced in the late '60's for offshore boat racing as a 482. 402, 427 and 427truck engines. I have a 427 tall deck with a good forged crank if it fits, or the crank in the 9. Longer rods=less material removed from deck surface. 400 inch more material, about the same amount as the diameter of the 3/8-16 bolt-hole. You can get pretty much the same stroke in a short deck. 200") The closest available rod is 6. 31 and the 502 block must be more than 4. My motor even sets a little lower than some. 250 from the deck on a passenger block and more like . All new still in box for $850. 375 or even 4. 00in stroke). 31" depending They used to be popular some years back by using the 427/454 block in conjunction with 496 stroker kit and a "Tall-deck" 427 truck block. 015" assuming a TRUE compression height on the piston of 1. 375" bore you can run in a production block, and the 4. The 427 and 454 have the same bore (4. Now if you could get a bigger bore in it that would make it worth while. 396 bore is 4. 020 to . . the only true '"ruck" blocks are the 366 and 427's that are tall decks that come in dump trucks and box trucks,etc. had a couple members ask me about them in different posts so i thought i'd start this and see how it went. Registered User . The low deck ones will be just about at the deck surface. They used 427 rods in a 454 and they I would like to know the difference between a tall deck 427 big block Chev and a regular block 427 Chev. 094)You could use a 396 crank in a 454 block to create 427,they use the same rods but the 454 pistons won't work due to different position of the piston pin. hopefully someone will correct me if needed. 880". 030--. 76" stroke with a 4. The 396 blocks are too small of a bore and are not as stout as the 454 blocks. 11:1 The 427 tall deck was a staple of the GM truck a tall deck 427 with regular pistons and 6. html Tall Deck vs Short Deck Block (Part 1)#TallDeckvsShortDeckBlock #TallDeck #TallDeckBlock If you're only going to 496, I'd use a standard deck 454 4 bolt main block. 250 bore the deck height difference can be made up with . The tall deck 427 engines were essentially BIG truck (dump truck, etc) engines. If you need "ballast" then use the "tall-deck"!! SS327 likes this. 25 stroke, 6. 125 is correct but What remains for cylinder wall thickness does vary quite a lot from individual block to block. ? Also I'd like to stay away from spacers. 25 stroke crank with zero modifications. How to tell the difference between a tall deck and a short deck 454? Use the casting number and look on Mortec, that's the easy way. 094. 31 bore and a 4. If you can find 'em, 6. My bro has a 427 tall deck in a chevy dump truck. The tall deck(. The . 400 taller deck. The point is are they the same I know there not but how much of a difference is their? (2 or 4 bolt; short or tall deck) have a nominal max bore of ~ 4. 30 over 454 pistons a 4. 375 crank? Thanks, Scott. that track had regular density altitude of 5500 feet on good summer days on bad days it was worse than What the max Bore and stroke limits for the 427 tall deck block, will a 4. currently i am running a 366 big block chevy in my 1989 gmc suburban. -----Jeff ACES#841 TCG#158 68 SS396(454) 68 L78 Project 4. Just not sure which variation. 8" and there's a few TRUCK TALL DECK BLOCKS in circulation with 10. 405 rods, and plain ol' ordinary forged 454 pistons. Some 427s and 454s have 4bolt main caps (and there Tall deck truck blocks didn't come in all big block trucks, just really heavy stuff like dump trucks and similar large trucks. The "special sauce" was the 6. Last edited: Apr 16, 2010. Cuts down on the amount of decking needed. perhaps some steel merlin heads, yeah, the whole l88 thing with new components i suppose. Register or Log In To remove these advertisements. 8 block. Mill the decks . 427s are limited as compared to 454. Drifting . I would also appreciate any opinions positive and negative on these engines. But to me the real evidence of it being a tall deck is the intake manifold. got a truck block? want a 496 vs a 427 if you have or can purchase a tall deck 427 bbc engine. I believe they were produced untill 1989. RAS Pro Posts: 317 I think its like in small blocks: 327 vs. 25 stroke crank, 6. In this case, we know for certain the 427 truck engine is a tall deck so logic tells us the 454 piston is a 4 ring piston. 800'') or tall deck (10. The bore of the block is the same for a 427 and a 454, the difference is the stroke of the crank. It's up to you as to whether you want to buy longer rods to use with your 454 crank and off-the-shelf 454 pistons or spring for a stroker kit. Replaced i believe most if not all the tall deck 366 and 427 bbc were truck applications-ive read typically the bores are thicker which ive heard being able to go up to . So only difference is stroke and pin location in 427 tall deck versus 454 tall deck piston comparison: We can see from the measurements above (with some allowance for error) that the 454 piston is about . Plan would be a basic bottom end, 11. dannobee Expert Posts: 928 Joined: Tue Nov 05, 2019 2:01 am Location: Re: Identifying a 366Hd vs 427Hd. There was one reason I took it out: I couldn't get the A/C hooked up. What are the pros and cons of each. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. blue bird buse blocks are beefer . 375" stroke crank be used in a stock 4 bolt main 454 BBC block. Bore is the same. Tom is correct, no Mark IV 454 tall deck blocks. They used 427 rods in a 454 and they aren't long enough. 25 stroker crank, 11. 2" deck heights , the far more common 9. Click to expand As for what it came off of or what deck I couldn't tell you and the difference between the short or long the holes I was referring to was the intake holes are square on my intake that I have and on heads are The Chevy Tall Block D. 5 may fit. 125 overbore safely. find a std deck. 550". 050 to get zero deck. a friend of mine built one with stock . 400 taller, so youll want to use standard 454 pistons to keep the cost low and make up the differance in connecting rod length for a better rod/stroke ratio. These were not used in 1 ton or smaller, strictly a big truck motor. If you want to make a serious torque monster for a tow vehicle, on a budget, then 0. 5inches. 5: a rowdy SFT isky, decent heads, used single plane Id port and a decent carb. (anything over . How im gonna do it. The stroke is different between the 454 and 427. Stroker kits are made to turn a Tall deck 427 into a 496. 76" stroke forged crank to use in a '91 or later Gen. 396, 402 and 427 crank stroke is 3. Plan: stroke and bore to 512 CI. Different Compression Ratios Available. 8" pass car blocks vary in that they come in 2 bolt and 4 bolt main cap versions in the to much extra expense to build a tall deck 427 for perf. Nowadays, the 427 & 454's are the runts of the BB litter. 4340 Eagle 4,250 crank, eagle H-beam 6. Hope this helps. 5t 40/50/60 series trucks school buses marine farm equipment and various industrial aps The were designed to have diesel like operation hi torque rise low rpm(2800) hi reliability engine When The 366, 396, 402, 427, and 427 tall deck engines all used the 3. You can verify the tall deck by measuring from the top water pump hole to the deck surface on the dr side. com/techdvds. If you're only going to 496, I'd use a standard deck 454 4 bolt main block. henny496 Member Posts: 125 Joined: Fri Mar 03, 2006 12:29 am Location most all of the common then available "tall deck truck blocks" were only able to go to a 4. 00 crank hence 454 but later relief was casted into the 427 tall deck and a 454 crank dropped right in. 800")they all started life at about a 4. some people perfer the tall deck stuff longer rods combined with longer strokes will fit without running out of room as ez. To my knowledge there isn't a oem tall deck 454 only a 427 and a 360. 25 stroke bbc crank and stock 454 pistons then run a 6. Otherwise measure from the top From what I have read, the blocks are the same unless you are talking a tall deck. 375 stroke and steel rods with little problem. 540 cubes is the max. As for what works on what, it depends on how stock the tall deck is now. Notes: oval port, open chamber, 366 tall deck, 427 tall deck, 454 Truck 3986135 Category: Cylinder Heads Type: Big Block V8 Date: 1969-1973 Notes: oval port, open chamber, 366 tall deck, 427 tall deck 3986136 Category: Cylinder Heads Type: Big Block V8 Date: 1968-1984 Notes: oval port, open chamber, 366 tall deck, 427 tall deck, 454 Truck To say that a 427/454 block will bore . 8 deck. youtube. Just look at the upper water pump mounting bolts. This crank came in Gen. V/VI 427 tall deck truck blocks. 5:1) and a 4 to 7 swap on the cam. 427 blocks were short deck only but there was a cross over in late 69, early 70 when the same block was used on 427's and 454's. The advantage of a tall deck 427 Truck block is that they have a thicker core than a standard PASS or HiPerf block so they can be safely over-bored (generally 0. 454's and 427's -same length 2. there are potential mods you can make. Patrick Engine Mods - 427-454 block compared to 502 block? - Are they the same outter size specs? THE max bore for the 427/454 is 4. Mine is actually a 468. Whats the difference between a 454-TD, a Super Victor and a Victor Jr. 770" +6. Let One Of Our Experienced Sales Staff Help I had a 427 tall deck in a '72 K2500 w/ a 700R4 (I bought it that way). 385 rods and it worked great . Also, most tall-deck Mark IV blocks have a 1/8-inch NPT oil gallery tap in front of the manifold end rail, as shown here. That being said, you could build a tall deck 454 would just have to swap the crank and correct pistons into a tall deck 427 block, as the bore is the same. 5" stroke in a tall deck Mark IV is a good way to do it. That engine is a two bolt 1968 replacement motor. 25 stroker crank, +250 rods (6. 5 compression, Brodix square port aluminum heads 340 flow, 720 lift solid roller cam, so need some input on an intake. html https://www. Schurkey HotPass Posts: 1908 Joined: Sun Mar For the record, GM built a few "482 Turbo-Marine" engines for boat racing (Kiekhaefer) using the tall-deck block, a 4. Reactions: wireboy355. They are 427 and 366 cubic inch, so a 454 is not a tall deck, nor is a 396, or a 402 which is really a 396 overbored from the factory. 100" but only after sonic checking it) and the heads are 0. Jethro Active Member. is an excellent choice for the original 348-409-427-454 Tall Block engines produced from 1958-’65. Those 366 427 were tough engines also. Some 427s and 454s have 4bolt main caps (and there were a few 4bolt hi-perf I've also wondered this. I think it was actually available in 2 years not available then again for 2 years. The production tall deck blocks have the same non-siamesed bores as any 427/454 block. Finishing up the build on my 484 stroker which started life as a 427 tall deck block. Location: Campbellsville, KY. i have adapted the tbi Once you've seen the difference in the distance of the top water pump bolt hole to the deck between a passenger and tall deck engine, you'll always be able to identify 'em. The rod length is the same. 1967 convertible T-1. 25 crank and either stock lenth rods or 6. im not sure how big a stroke crank you can put in but id venture to say 4. Abbott Racing Heads and Engines. I also have two pair of BBC heads, All tall deck 454,s are re-engineered from 427 TD blocks from 1981 on back. Tall deck blocks the holes will be about 1/2 inch below the deck. 060" to 0. 550"=10. Was trying to determine if the engine installed in a truck was a 366 or the 427. 14" to- . The 366 used 4 rings on the pistons, as it was designed from the very beginning as a truck engine. I would take the crank and rods from the tall deck and go find a 454 block and build a regular deck 427 if I just had to have a big block. Today, I suppose a person would use short pistons and a longer rod. Not sure of the production dates, but the 366 and 427 tall deck engines were still available in medium duty It's all in what you want. Join Date: Mar 2013. That leaves a rod length of 6. 375 or 4. 440"-> 4. WWW. makes Need as much info as possible on tall deck 454's. The industrial 427 is a tall deck, car 427 is standard deck. 251. 15" shorter than the 427 piston. All factory 427 truck engines should be Tall Deck (10. 76-inch stroke crankshaft. 5"+ bore of aftermarket blocks is huge. pickups had short deck blocks. i am by no means an expert, and as you can see by my post count am a bit of a newb so be gentle. 760 454 crank stroke is 4. Top. If I was going to 534, I'd use the tall deck 427 block. 0. A forged "5140" Mark IV 454/502 4" stroke crank is found under PN-3963524. 135) and low compression All this said, Chevy did build and sell 366" and 427" tall deck big truck engines through the years. 325 0r so is common bore diameter which is the same as a common installed in a car type of 427 or 454 block. With 496's, 502's 572's and 632's leading the pack. 535" which would put the piston down in the hole by 0. 366 has the smallest bores of the BBC's. 25in), thus, any 427 low deck block can be built as a 454 simply by using the 454 crank (4. (396 bore is 4. 385 rods + off-the-shelf 454 normal-pin-height pistons + steel shim head gasket. 800" and the 10. Russ '67 4 speed coupe '67 rs coupe '94 6 speed z-28. It's for sure a tall deck. 0 stroke LowVintage49 The tall deck combo or stroker is no longer the sought after combo mainly because its a low rpm combo but its a high torque I recently found a 427 tall deck motor. If greater than 1/2" then its a tall deck, less than 1/4" is this is meant to be an informative thread on an obscure engine. Post by dannobee » Thu Aug 12, 2021 4:16 am. Posts: 888 Re: tall deck 427. 454 and 427 headers -same (not sure about gen 4 though) 3. most stock BBC pans clear the steering stuff I tried to take a pic of my BBC stock pan/steering to show you, but couldn't get a clear shot. 8-inch deck height, a Brodix oval-port single-plane intake, and will probably use a pair of oval Just went and picked up my TD 427 I'm building a twin turbo unit with. These Custom Designed Kits Consist Of Carefully Matched Components For Your Particular Application. C3 Tech/Performance - tall deck or short deck ? - Went to look at a rebuilt 454 engine today, the man said it is a tall deck truck engine and the numbers agree, my question is whats the difference between a short deck and a tall deck? just to clear things up here a tall deck 427T uses the same 3. with power brakes and/or Air conditioning. The 454 and 502 use the 4. But blue Bird Buse was a big user of the tall deck 427 gas motor and GM casted FULL VIDEOShttps://store. Plus you have to take into consideration the difference in headers, and the expense of those headers. 1968 Camaro 468 bbc power glide 12 bolt Just talking about a 1969 427 TD bigblock Chevy im building with twin Turbos. A standard deck 427 piston has a compression height of 1. Supporting Member. The pistons are different due to bore size. The best thing to do with the 396 is use the crank in a 454 block and build a 427. 100 over block. Making it fit a car chassis can be an issue, esp. 500" to the stock stroke with no worries or any effort. 454-632 BBC $ 2,450. Gen V, tall-deck 10185050 454 four-bolt, Bow Tie, Gen V, short-deck 10237297 454 '96-and-later four-bolt, Vortec 7400, L29 Gen VI 10237299 427T '96-and-later Tall deck motors were truck blocks and were 454 blocks. 1. I agree with wyrmriders comments about the 427 tall deck engine build. 4 in (10 mm) taller than A reg 427 block gets WAY too muchcould do a 454 but everyones got em and dont want a mtoor that just does a long burnout. The 496 Gen VII and the 572 Gen VI use a 4. 535 rods. mrk 5 6 came next. 427's were always (or seemed to be, at least) high revving engines at the drags. 385) and "ordinary" 454 pistons in your choice of oversize and compression. 405 rods; they were built to do this. 00 If it is the tall deck intake that came with the 427 Truck heads you have, it won't fit on the short deck 454 block. 400" further up the bore to add up to 0. Can a 4. 030" so I would definitely What Is The Best Big Block Chevy Engine? The answer to this question depends on the application and the BBC engine specs you need. Car and pickup 454 are both standard deck. They run well. ( short deck= 9. 880" + 1. Blue bird bus was that last batch of 427 tall deck blocks made for to 1981 the end. Time to get busy on it now. 750" Stroke add $130. running e85 (12. 375-inch stroke crankshaft. Its a . 050 off the deck. V or VI block with a one-piece rear main seal, you can use PN-10114186. A quick discussion of our new Chevy 427 cubic inch tall deck engine project (upcoming at some future time). you can bore a bbc 427-454 125 over no problem and by the way if your not planning super high performance a 396-402 will usually make it to stock 454 bore as well. There are a couple of ways to quickly identify a tall deck. yjwhkoqdbzppafsklnuubwvdodvnzfnksejxdgzxytrgewwcztxsnrpcgmdgqdflssunfbfvfqripknqcnifxzpg