86 caprice. 305 to 350. drive shaft lengths?

[m3gas3th]

i am going to put a 350 with 350 turbo trans into my 86 caprice classic that has a 305 with 700r4 and i was wondering if i would have any problems with the lengths of the drive shafts.

i dont know much about cars but i asked the guy putting the engine in if there would be any problems doing it and if i would need extra money to make the transition and he said i might want to find out if the drive shafts are the same length.

thanks for reading, i appreciate any advice,
and have tons more questions if you have time.

[toddman67]

Take a measurement on both transmissions from bell housing to tail shafts, that should be a good indicator.

[m3gas3th]

thanks todd, that sounds like a last minute, last resort option.. but if it comes down to it thats what i will do! and i appreciate your help!!

BUT, i still have to drive this thing!! and id hate to tear the motor out and it not be the same!! anyone know for sure??

[silicon212]

Originally Posted by m3gas3th

i am going to put a 350 with 350 turbo trans into my 86 caprice classic that has a 305 with 700r4 and i was wondering if i would have any problems with the lengths of the drive shafts.

i dont know much about cars but i asked the guy putting the engine in if there would be any problems doing it and if i would need extra money to make the transition and he said i might want to find out if the drive shafts are the same length.

thanks for reading, i appreciate any advice,
and have tons more questions if you have time.

You will need to get a driveshaft for the TH2004R trans to make it work, provided your TH350 has the common length 6" tailshaft.

[toddman67]

Silicon212 brings up a good point, spline size etc. If the 700r4 is good? keep it in the car. Otherwise the web site below might help.





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[m3gas3th]

todd, the 700r4 is good. i think the 305 has bad rings or something ( vibrating, lots of smoke from exhaust) i took it to a shop and they said the motor had oil leaking into the # 6 head. so im upgrading.

my boss is selling me the 350 with the 350 turbo trans on it with a shift kit for only 300 bucks. i know it runs good, it was in one of the work trucks until the frame bent. SO, is the 700r4 really all that or what? or should i sell it and get the 350 and trans for basically free??

i understand the 305 and 700r4 is better gas mileage and all that, but i want power! theres always hydrogen systems later..

[CD Smalley]

700 has a low first gear, plus the over drive. You be much better off in the long run with the 700.

[m3gas3th]

so u think the 700r4 would be better on the 350 rather than the 350turbo? and if so, would it go in there with no problem?

[silicon212]

Originally Posted by m3gas3th

so u think the 700r4 would be better on the 350 rather than the 350turbo? and if so, would it go in there with no problem?

Absolutely. Look at my sig - my 350 has been augmented for more torque than stock and the 700R4 (which, might I add was pulled from an '86 with 305 in '06) is loving every minute of it.

The 700R4 is the logical choice - it offers the best 'off the line' performance of any of them, and has overdrive, and requires absolutely no modification of any other systems to work.

[CD Smalley]

+1 to Silicon's last comment. Use the 700R4.

[toddman67]

I agree, Keep the 700r4 in place and just swap the engine. Less work!

Less is more.

[m3gas3th]

saaweeeet.. thanks guys. i guess that pretty much wraps that question up. anyone wanna buy a transmission? hahaa.