Summit and Jeg's sell new Eaton positraction carriers for the Chevy 8.2" 10-bolt. This is a fairly simple swap--just pull out the single-leg carrier and install the stock ring gear on the new carrier, then put it back together. Just be sure it's a 3-Series carrier because your stock 10-bolt is likely geared 3:08 with a 327/210 and a Slip-O-Matic. I'd pull the cover and make sure what the ratio is before I ordered anything! You'll need a cover gasket, 85W90 gear lube, and be sure to go to the Chevy store and get a bottle of GM positraction additive or the clutches will chatter on turns. You'll also need new carrier bearings and some ring gear marking compound to check the mesh of the gears after you put the new carrier in, and a dial indicator to check the backlash, just to be sure. 99 times out of 100 none of the clearances will change enough to be a problem, but you still want to check them. Sounds like a great way to while away a cold winter afternoon in the shop! Good luck!
