700R4 Tranny for 1970 K10 4x4

[mrein3]

Originally Posted by 72chevyk10

i may be compleatly wrong (probly am ) but i thought the th350 and 700r4 used the same t-case adapter?

You are completely right. However you need to put a different output shaft in the 700r4. Search Advanced Adapters website for the part. The last time I priced this swap out the output shaft was cheaper at Summit Racing than the AA website.

Because the transmission is almost two inches longer than the th350, you'll need to move your engine forward that distance or move the t-case back and do work on your driveshafts. It seems the consensus here is it is best to move the engine forward.

This swap is on my list. I even have the core transmission on the floor in the shop waiting for the money to have it rebuilt and have that output shaft installed.