[MARKDTN]

Originally Posted by Dieselwrencher

You should be able to pick up one from a C3 corvette pretty reasonable. Look for 75-82 parts. They seem to be the cheapest. You could also look for stuff from C4's. 84-91ish should be cheaper yet I'm guessing. Those complete cars don't bring much.

Not quite that simple. 64-79 Corvettes (C2 and most C3) are one style with an iron diff. 80-82 (last 3 years of C3) are another style with aluminum diff and do not interchange. 84-96 are completely different than those; and automatic and 6-speed are different than each other. The C4 automatic Dana 36 style is not in huge demand, but the C4 Dana 44 6-speed setups are in high demand and quite spendy $$. All C4 suspension is in some demand for those doing tube frame swaps into earlier Corvettes and street rods. Not everyone wants the C5 and C6 Corvette stuff because of the rear transaxle. I'm not sure you gain a lot from doing this anyway. I'd do a car 12 bolt and leaf springs long before I did an IRS swap in a truck. My .02