1983 chevy SWB Rear end

[Dru]

lol, wish I had a turbo 400, and a limited slip 3.73 under my truck before I started, that's the good stuff, but 3.42 would have been better.

The swap is pretty easy, but finding another G80, with a 3.08 in it, might be a little tough, unless you dont mind a one legger?

Would be half tempted to find a different ring and pinion.

Swapping out the th400/373 to a th350 should gain you a little mpg also, it takes more power to turn a 400, but the amount might be so little, that it isn't very noticeable.