I have a turbo 400 tanny on my GS. What size of driveshaft do i need because i have a guy who has a lot of 400 driveshafts but he needs to know the size. My car didnt come with one when i bought it so i cant measure mine.
Well, from center of u-joint cup to center of u-joint cup for a 70 with 8.5" rear you need 53.75". If you have an 8.2" rear, original to your 70, you will need 54.5" Tube diameter is 3" and you want a 1-piece driveshaft.
