T56 trans. into 74 Firebird

[xero69]

I have a few questions and didn't see a transmission section on these boards so here goes..

I'm in the process of gathering parts for a T56 installation into a 1974 Firebird Formula 350 with a stock 3 speed manual and a Pontiac style 350 small block.

I've been to www.t56kit.com and the kit for the 2nd gen Fbody should be out soon and I'm thinking this is the kit I will use since it has the Pontiac style block adaptor plate included and I can retain the stock starter location. Kit will include all needed parts and adpators so I don't have to do any welding. I read on the T56 kit site that they recommend a "98+ LS1 style T56" and that the hydraulic throw out bearing is key to not having to relocate the stock starter. Does anyone know the part number for the 98+ LS1 style T56?

Someone is offering me a sweet deal on a practically new T56. Here is all the info he could give me:
The tranny is model # 1386-000-011,
It has a 26 spline inputshaft and 27 spline output shaft.
Gears are as follows: 2.97-2.07-1.43-1.00-.80-.62 with a 3.28 reverse. Lakewood scattersheild, Ram billet steel flywheel, centerforce dual friction clutch, and every fastener needed to install it.
The clutch is 11 in. diameter, 1 1/8 in. x 26 spline input shaft Centerforce dual friction part # DF148552
Flywheel is a Ram billet steel SFI approved part # 1501, internal balance, 168 tooth, billet steel, 33 lbs.
A lakewood clutch-fork, Centerforce throwout bearing, Lakewood adjustable fork stud, and new tranny mount are included.
Also comes with ARP Pro-series bolts for both the flywheel to crank and also pressure plate to flywheel. This setup is in perfect condition and was barely used according to seller.

Would this part be a "98+ LS1 style T56"? Are these gears decent for street use? I want the car to have a nice 0 to 60 time, but I also want low RPMs on the highway to save gas. Unfortunately I do not know what the stock rear end gear ratio is on the Firebird, and I don't know if there is a way to tell simply by looking at the car.

Any help would be greatly appreciated!

[Jeff_in_Atl]

I'm not sure if this will help or not. According to http://www.5speedtransmissions.com/6_speed.html , that transmission is a GM aftermarket which makes it neither an LT1 or an LS1. But since you are concerned with a 74 all you may be concerned with is dimension A. You're probably going to have to custom fab a transmission crossover bracket to get C anyway but You're going to want something close.

[xero69]

That's a great link, thanks!

The T56 kit comes with the crossmember or I could order it seperately. The only part not included with the kit is a shortened drive shaft which I can source locally. Ideally all I would need to do is modify the opening in the transmission tunnel. That way I could return the car to all original if a collector was interested in buying it. Car is 95% original for now...