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Username Post: Tall Deck 427
Dad
Forum Newbie
Posts 35
 02-19-12 10:32 PM - Post#2192760    

I recently purchased a late 70's to early 80's .060 over tall deck 427 reman engine w/very low miles. I want to build this for street strip, mostly street. I want to run a 6:71 blower w/carbs aluminum rectangle port heads, 6.535 steel H-beam rods and forged flat tops w/ a 1.645 C.H. Can anyone tell me if this combo is right? I want the longest rod possible without the pin getting in the lower ring. thanks for reading, Dad
gchemist
Senior Chevytalk Moderator
Posts 20885
gchemist 		02-20-12 05:46 PM - Post#2193086    

Welcome to the site. The truck tall deck motors are strong at low RPMs. C30+ trucks used them for hauling cargo. Car and truck motors are different. The difference is deck height, intake, distributor, and the tall decks came with 4 ring pistons. Heads, crank, cam, rods, etc etc will interchange. The intake will not interchange.
If the height of the tall deck is no concern , add a 4.25 stroke crank, 6.385 rods, the "regular" 454 pistons of your choice, and cut about .050 off the deck. Simple, cheap and easy 496.

The motor gurus can provide better information.
'83 Silverardo XST - ZZ4 powered
'96 GMC Jimmy LS

grumpyvette
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts 15669
grumpyvette 		02-21-12 08:21 AM - Post#2193329    

personally IVE always preferred the tall deck blocks when building a 496 but IM in the minority, Ive used the scat 4340 forged crank rotating Assembly with 6.385" rods and 7/16" rod bolts
CHEVY: Rotating Assemblies
CHEVY BIG BLOCK 4340 FORGED ROTATING ASSEMBLIES
CHEVY 454 BIG-BLOCK 2-PC REAR SEAL 454 MAIN, 4340 FORGED CRANKS, H-BEAM RODS WITH 7/16" CAP SCREWS, obviously gearing and compression heads,intakes etc. change your cam choice so talk to CRANE AND CROWER AND ERSON about your cam choice once your sure of those components


http://www.scatcrankshafts.com/

CI Crank Rod Piston Bores ize Type 58cc 64cc 70cc I nclcrp Inclcrprb Compl
460 4-454-4000-6135 2-454 -6135-2200 FORGED 4.280 FLAT 8.9 8.4 8.2 1-42005-1 1-42005 1-420 05BE
460 4-454-4000-6135 2-454 -6135-2200 PREMIUM FORGED 4.280 FLAT 8.9 8.4 8.2 1-42010-1 1-42010 1-420 10BE
460 4-454-4000-6135 2-454 -6135-2200 FORGED 4.280 DOME 13.7 12.8 11.9 1-42055-1 1-42055 1-420 55BE
460 4-454-4000-6135 2-454 -6135-2200 PREMIUM FORGED 4.280 DOME 13.7 12.8 11.9 1-42060-1 1-42060 1-420 60BE
460 4-454-4000-6385 2-454 -6385-2200 FORGED 4.280 FLAT 8.9 8.4 8.2 1-42105-1 1-42105 1-421 05BI
460 4-454-4000-6385 2-454 -6385-2200 PREMIUM FORGED 4.280 FLAT 8.9 8.4 8.2 1-42110-1 1-42110 1-421 10BI
460 4-454-4000-6385 2-454 -6385-2200 PREMIUM FORGED 4.280 DOME 14.0 12.7 11.7 1-42160-1 1-42160 1-421 60BI
489 4-454-4250-6135 2-454 -6135-2200 FORGED 4.280 FLAT 9.4 9.0 8.6 1-42255-1 1-42255 1-422 55BE
489 4-454-4250-6135 2-454 -6135-2200 PREMIUM FORGED 4.280 FLAT 9.4 9.0 8.6 1-42257-1 1-42257 1-422 57BE
489 4-454-4250-6135 2-454 -6135-2200 PREMIUM FORGED 4.280 DOME 10.5 10.0 9.5 1-42260-1 1-42260 1-422 60BE
489 4-454-4250-6385 2-454 -6385-2200 FORGED 4.280 FLAT 8.9 8.5 8.2 1-42305-1 1-42305 1-423 05BI
489 4-454-4250-6385 2-454 -6385-2200 PREMIUM FORGED 4.280 FLAT 9.4 9.0 8.6 1-42310-1 1-42310 1-423 10BI
489 4-454-4250-6385 2-454 -6385-2200 FORGED 4.280 DOME 10.8 10.2 9.7 1-42355-1 1-42355 1-423 55BI
489 4-454-4250-6385 2-454 -6385-2200 PREMIUM FORGED 4.280 DOME 10.7 10.2 9.7 1-42360-1 1-42360 1-423 60BI
CHEVY 540 BIG-BLOCK 2-PC REAR SEAL, 9.780 SHORT DECK 454 MAIN, 4340 FORGED CRANKS, H-BEAM RODS WITH 7/16" CAP SCREWS
CI Crank Rod Piston Bores ize Type 58cc 64cc 70cc I nclcrp Inclcrprb Compl
540 4-454-4250-6385 2-454 -6385-2200 PREMIUM FORGED 4.500 FLAT 9.8 9.4 9.0 1-42370-1 1-42370 1-423 70BI
540 4-454-4250-6385 2-454 -6385-2200 PREMIUM FORGED 4.500 DISH 8.7 8.4 8.2 1-42375-1 1-42375 1-423 75BI
540 4-454-4250-6385 2-454 -6385-2200 PREMIUM FORGED 4.500 DOME 14.8 13.5 12.27 1-42380-1 1-42380 1-42 380BI
CHEVY 454 BIG-BLOCK 2-PC REAR SEAL, 10.200 TALL DECK 454 MAIN, 4340 FORGED CRANKS, H-BEAM RODS WITH 7/16" CAP SCREWS
CI Crank Rod Piston Bores ize Type 58cc 64cc 70cc I nclcrp Inclcrprb Compl
572 4-454-4500-6535 2-454 -6535-2200 PREMIUM FORGED 4.500 FLAT 10.0 9.7 9.4 1-42385-1 1-42385 1-423 85BI
572 4-454-4500-6535 2-454 -6535-2200 PREMIUM FORGED 4.500 DISH 8.8 8.5 8.2 1-42390-1 1-42390 1-423 90BI
572 4-454-4500-6535 2-454 -6535-2200 PREMIUM FORGED 4.500 DOME 15.5 13.1 12.2 1-42392-1 1-42392 1-423 92BI
572 4-454-4500-6535 2-454 -6700-2200 PREMIUM FORGED 4.500 FLAT 10.0 9.7 9.4 1-42395-1 1-42395 1-423 95BI
572 4-454-4500-6535 2-454 -6700-2200 PREMIUM FORGED 4.500 DOME 15.5 13.1 12.2 1-42397-1 1-42397 1-423 97BI
CHEVY 454 BIG-BLOCK 1-PC REAR SEAL 454 MAIN, 4340 FORGED CRANKS, H-BEAM RODS WITH 7/16" CAP SCREWS
CI Crank Rod Piston Bores ize Type 58cc 64cc 70cc I nclcrp Inclcrprb Compl
489 4-454-4250-6385-L 2-4 54-6385-2200 FORGED 4.280 FLAT 8.7 8.4 8.0 1-42405-1 1-42405 1-424 05BI
489 4-454-4250-6385-L 2-4 54-6385-2200 PREMIUM FORGED 4.280 FLAT 9.4 9.0 8.6 1-42410-1 1-42410 1-424 10BI
489 4-454-4250-6135-L 2-4 54-6135-2200 FORGED 4.280 FLAT 9.4 9.0 8.6 1-42450-1 1-42450 1-424 50BE
489 4-454-4250-6135-L 2-4 54-6135-2200 PREMIUM FORGED 4.280 FLAT 9.4 9.0 8.6 1-42452-1 1-42452 1-424 52BE
489 4-454-4250-6135-L 2-4 54-6135-2200 PREMIUM FORGED 4.280 DOME 10.5 10.0 9.5 1-42454-1 1-42454 1-424 54BE
489 4-454-4250-6385-L 2-4 54-6385-2200 FORGED 4.280 DOME 10.5 10.0 9.5 1-42455-1 1-42455 1-424 55BI
489 4-454-4250-6385-L 2-4 54-6385-2200 PREMIUM FORGED 4.280 DOME 10.7 10.2 9.7 1-42460-1 1-42460 1-424 60BI
540 4-454-4250-6385-L 2-4 54-6385-2200 PREMIUM FORGED 4.500 FLAT 10.2 9.8 9.4 1-42500-1 1-42500 1-425 00BI
540 4-454-4250-6385-L 2-4 54-6385-2200 PREMIUM FORGED 4.500 DOME 10.8 10.3 9.9 1-42505-1 1-42505 1-425 05BI
540 4-454-4250-6385-L 2-4 54-6385-2200 PREMIUM FORGED 4.500 DISH 9.8 9.4 9.0 1-42510-1 1-42510 1-425 10BI

http://forum.grumpysperformance.com/viewtopic.php?...

http://forum.grumpysperformance.com/viewtopic.php?...


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" " IF YOU CAN'T SMOKE THE TIRES FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK !"

Dad
Forum Newbie
Posts 35
 02-21-12 09:52 PM - Post#2193648    

Thanks for the info, I am aware of the tall deck differences. That's why I picked it, and it was very cheap $100, was complete except for carb , water pump and exhaust. I'd say it had maybe 2500 miles on it. It was using oil. I got one heck of a deal. Grumpy gave me alot of info I am reading through now. Thanks again Dad
Dad
Forum Newbie
Posts 35
 02-21-12 10:10 PM - Post#2193653    

Thanks for the info Grumpy. It made for some really good reading and lots of good info as well. I have built several small blocks throughout the years but only a few big ones, and what you have posted tought me alot about them I was unaware of, most of all oiling. With your info, I have decided to go with a 496 rotating assembly. For the money , it is the best value and I know going in that all will work out for the best. Still thinking of the blower though. The Cam, I will have to talk to one of the cam makers in order to get the right combo there. I have talked to others and by far you gave me the better info. Thanks again, Dad
Dad
Forum Newbie
Posts 35
 02-21-12 10:16 PM - Post#2193655    

One other thing, Whats up with milling the deck .050? I know the pistons on a big block dont go to the top, but why do this? I will be using a blower,, Dad
gchemist
Senior Chevytalk Moderator
Posts 20885
gchemist 		02-22-12 03:38 AM - Post#2193690    

You can take off 0.005 without affecting cam timing. If you need the extra clearance for compression, just leave it alone.

What's the now 496 going into??? Just curious!! Someday, I'll drive something that has a BB bigger than a 454.
'83 Silverardo XST - ZZ4 powered
'96 GMC Jimmy LS

Dad
Forum Newbie
Posts 35
 02-22-12 06:13 PM - Post#2193987    

I'm building a '36 chevy low cab pu, mustang after market IFS, 9" ford w/4link, 4 wheel disc brake, I set the engine back 5". I have a frame jig that I have built a few frames on, this one is on there now, the frame is almost finished. I used 2 x 3 x 3/16" wall rectangle tubing then a Chris Alston 10 point cage. It will be a true chevy "RAT ROD" lol,,,, if I could figure out how to put up some pics I would. Dad
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