b454rat
I'm Awesome
If your mechanical or know someone that can swap gears, look for a true posi from a mid 90s Caprice, Buick roadmaster, Caddy's, cars that body style. Need to look for certain ones, wanna say a tow package, but they have the same rear diff as these trucks, but used an actual posi, not the grenade lock. RPO codes are the same, so just a matter of finding the right one. Or, as others mentioned, get a G80 rear from a truck. I think the 8.5 10 bolts were the same, just the axles themselves are different. Tape measure will tell for sure...