Smokeyz28

i am going to get some sticky rubber for the rear for sure.. how much could i expect to get a decent t56 tranny for? those are 5spd right?

i just went to Canadian Tire and asked them how much some heavy springs would be.. buddy said $280 CDN for fully adjustable coilovers.. he said i could raise the front a bit... keep it the way it is.. or lower the car..

i don't really have a set mind for power right now.. but id would be nice to be running 12s.. or pretty close.. i dunno how much stock hp/tq a chev 454 has.. anyone know for sure? i know making power with a 454 wont be a hard job by raising compression.. cams, full exhaust, etc

Snoochies

my neighbor has an 86 Z28 with a 454 BB, 4 speed Muncie, and 273's in the rear and it sure rapes my car!! I can't wait till I see what it does in the quarter.

82355

A big block Chevy only weighs around 100 pounds more than a small block, there would be no need for different springs or shocks. Hell how many of you guys have removed a hundred pounds from under the hood of your car? Did you go out and buy lighter springs??? The stiffer springs with a big block is and old wives tale.

As for the 455 Buick with a TH700R4 behind it, did he use an adaptor plate or just hold it together with the only two bolts that line up in comparision to a Chevy and BOP tranny pattern???

Smokey Z28, if you have the time and money to do it right I'd say go for it if you want to put the big block in, I've seen it done and it is kind of neat. Myself I'll just stick to wingin small blocks.

Martin

super83Z

Ok where to begin

First off no one said that the 455's are junk. They may be cheaper coming out of a junkyard but parts for them are considerably more than a BBC.

My friend swapp in a BBC 396 from a SBC 305 in his MOnte Carlo with new springs. The front end sagged considerably more than with the SB and the suspension was all over the place when he takes corners.

super83Z

OH an no T-5 tranny will handle a BB. A built T-56 would have more of a chance.

l_bilyk

T5 - 4 speed + 1 overdrive
T56 - 4 speed + 2 overdrive gears (which is ideal if you have a huge engine or really tall gearing)

whereabouts are you located? i've seen slightly used T56s go for 3 - 4 grand
it may seem like alot for a tranny... but keep in mind these babies will handle alot of power... that is why they are used in pretty much every single flagship sports car from an american company

Smokeyz28

holy **** that's alot.. i can't afford that
i live in kelowna, bc

super83Z

I don't know about 3 or 4 grand. I got mine with everything for $1500. My buddy got one with everything delivered to his house for $1300 w/everything needed aside from the crossmember. I don't know how much that comes to in Canadian but just call around some local junkyards.

l_bilyk

hmm i suppose if you hunt around you can find it for less
but i know a guy who went through a few of these, and it cost him about $3000 can. a pop
i think that might have included installation but i am not sure

3GLT16speed

just remember guys hes talking canadian. not too sure on the exchange rate as of late but its usually arould 1.5 to 2 to the dollar. that means 3000 can is around 2000-1500 american. sounds pretty average to me.

1984camaroz28

Ok i just went down the hole road of doing this.....for the front end u just got replace the srpings u can get them thro summit. who ever said u need all kinds of other stuff is hitten the pipe. u will need a set of headers to fit that they r like 480$ outa summit. if u got a good big block that throw out some crazy hp get a good turbo 400 to back it and a 12 bolt rear. You will need some type of ram air hood and a 3 row radiator to keep it cool. comon sense u will put frame connectors in. and it whould help to put in a roll cage. for you 454 u will need a 68 chevelle oil pan to clear the cross member. i got a 650hp 427 i was gona drop in mine but it whould have shreded my turbo 350 to pices and my 10bolt rear whould be history.

82355

whiteminqua I still want to know how your buddy connected a 455 Buick with a BOP pattern to a TH700-R4??? Did he use an adaptor plate or just use two bolts to connect engine to tranny? I think I am smeeling a little BS

Martin

whiteminqua

Hey, its common knowledge. You need an adapter for the 700r4 to be used with the BOP engines. I think Mike used one from TCI.

Mike has over 30 years of Buick performance experience and knows how to make a 455 run. The installation in the Trans AM is tight, and he had to use the factory cast iron exhaust manifolds.

If you really want specific information, I am willing to forward an email from you if you want.

The big Buicks make lots of torque. The GS 455 had 510 ft. lbs. of torque in 1970. A stock GS can easily run low 14 second times with no problem. (At about 4100+ lbs. of steel) My brother had a restified 71 GSX that ran 12.90s on street tires, through the mufflers, no headers-stock appearing motor.

If I was ever to put a big block in my 86 IROC, it would be a 454 Chevy. Its a common engine, lots of parts available, and the swap has been documented over and over. There is a ton of information out there. But, thats what makes cars and hot rodding so much fun. Lots of spins on the same ideas. GO FASTER.

Have fun. And by the way, its not BS, its just the truth.