I have a 71 cutlass. I’m doing an ls swap on it, 4l60 transmission. I’m looking to swap my rear end with a 90s rear end from a salvage yard ( what year make and model with be compatible? Or rebuild my old one. What will be my opinions for that also? I won’t be racing it, just cruising, but I would like a nice take off and want posi also.

 

Nothing from the ‘90s will be a bolt in replacement. The ‘71 rearend should be an 8.5” 10 bolt which is a very good, strong rear. There are lots of gear sets, posi carriers, and axle shafts available from many sources.

 

He can rebuild yours the way you like and has experience with the rear ends in our cars