slick1851

Going PMed a guy about, have money in my hand just waiting for a adress to go get it.

Anyways, recently rebuilt with heavy duty clutch packs and a shift kit...what is needed for it to bolt up to a LT1?

I see the conversion for LS1s but not LT1s really...never looked into it


Dont really see why it wouldnt be streetable at all..

4thgenz

turbo 350 crossmember
stall
driveshaft
maybe a flywheel...but i doubt it
um...i saw somewhere bout a taill shaft for the 350 that has the correct hook up for your elec. speedo.

and i think thats it.

i just got a th350 also! gonna be doin this soon as well.

please chime in though if i missed something!!!

slick1851

I might be buying one tomarrow, just looking for what is all needed and were to buy it...also like you

slick1851

Some people say its no good in a street car, but that makes no sense seeing how cars back in the day were driving around with them, juts a weekend car so its fine

plaf713

iTrader: (8)

yuck, no over drive

z28hustle

what tranny are you running on that stroker? and how much did you spend?

plaf713

iTrader: (8)

1200 on a built 4l60e, relax guy its a joke

Dragframe

iTrader: (14)

i really do honestly wish i cold afford a nasty nasty 4l60e... but a build 350 is so cheap.. im gunna do a t-brake rev/manual valve body...

Redneck performance is probly who im going to try...

BizZzatch350

iTrader: (33)

The TH350 if the car isnt geared crazy is fine around town, fun to rip on, kinda sucks on the high way though. Also a lot have done the conversion on LT1s, more than you think. People were doing the conversions before the LS1s were out.

smoknta

If you build it right, it will hold up and go in without a hitch. You should have it built with a Tekpak-Fitzall switch kit. This will allow you to use your 4L60 tailshaft by using a 1 3/4" alluminum spacer. This allows you to use the stock crossmember, stock torque arm mount, stock length driveshaft, and stock speedo sensor. The kit comes with a spacer and hardware, and a longer output shaft. You have to put the output shaft in during a rebuild though.

Otherwise you would need a 9" tailshaft on your TH350 to allow use of the stock length driveshaft. But you would still need a modified crossmember.

slick1851

I mean it should be fine with a 3.73 gear and 65mph on the highway?

Dont really see a huge problem.....

LT1Falcon

iTrader: (3)

a good way to see what you will be doing with no overdrive is to drive around in 3rd gear for a4 or 4th gear m6, keep in mind they are locked up, so if you go unlocked converter your rpms will be a little higher depending on stall

slick1851

So what do you suggest to go with? This is going to be a street car also...

slick1851

Maybe get a 3.42 gear?

94Pontiac

iTrader: (4)

3rd gear in the th350 is just 1.00, same as 4th in a m6 and 3rd in the 4l60e.

LT1Falcon

iTrader: (3)

thats pretty much what i said.

and lower numerical gears would definitly help streetability but will cost you a little at the track

Dragframe

iTrader: (14)

Well a th-350 tranny i should retain fair streetability because of me having a turbo car and longer gears (in the rear end).

dhdenney

iTrader: (53)

I would use a 3.08 gear for street. If I go 9" I'm going to use a 3.00 and if I do 12 bolt I'm gonna use 3.08. That way it'll be about 2500 at 65 mph.

slick1851

So should I just leave in the 2.73?

dhdenney

iTrader: (53)

Well you'll have the ultimate highway gear for a 3 speed auto. From what I have read, people with the A3 and the high gears are not really suffering any performance loss.