what year 350 and 205 can I use
 

How new of a tranmission and transfer case can I use in my 71 Jimmy and will I need new drive shaft for front and rear I have 4 speed now would like to convert to auto. How do I identify 350/205 combo. will try to find at U pullit type of junk yards. any help would be great thanks Mose

If you are pulling something from a junk yard get the front drive shaft if you can. That will be different for sure. I cant remember about the back. I think it may have to be adjusted too. Something I did with the Blazer we have is I left the clutch petal in but just put it under the carpet. Will save problems if ya ever wanna go back to a 4 speed like the son-in-law did.

PS 350/205's are pretty rare here where I am. You will also need a shifter, flywheel, crossmember, and a radiator for a tranny cooler or an after maket cooler for the tranny.

I am under the impression that the th350 and 4 speed that came in these trucks are exactly the same length. the difference is in the transfer case/ Tranny adaptor only. Everything else including the drive shaft LENGTH is the same.

I don't know if this is 100% accurate or not but I'm sure some one will let me know If I'm mistaken...

You should be able to tell the th350 by the nearly square oil pan with one corner cut cleanly off. Look for the externally mounted vacuum modulator at the rear of the tranny. (It will be the size of a coffee cup) There are various tags on the th350s that will give you information so bring a good scraper.

I'm not sure how to tell you how to ID a 205, I just know what they look like. There’s a good pick of the rear of a 205 posted on another thread...

http://67-72chevytrucks.com/vboard/s...threadid=30203

There have been many other threads with great pics as well. Read back a few months, the 4X4 section is a low activity section of the board shouldn't be hard to find.

All years this setup was present will work ok. Hope that helps a little... Pete.

Damit that is the wrong thread...

http://67-72chevytrucks.com/vboard/s...threadid=35011

Try that one... Pete.