First on all, I thought the new carriers would work in the Buick housings. I had a 2.93 posi that I had a guy put 3.36 gears on with a spacer. The big problem was the bolts on the ring gear were smaller than the ones on the 2.93 gear. We had to make shims/or filler tubes to take up the looseness from the small ring bolts. He could not get the perfert pattern but acceptable for my use.
Mocha-Forever in my heart RIP
1964 Buick Skylark Convertible (TSP 525hp 550TQ Iron head 464)
1967 GS400 Hardtop Best ET 1.788 60 FT 12.68 @ 104.53
1967 GS 400 4 spd Convertible (in boxes now)
1968 Electra 225 Custom with 46k original miles
1970 GS 350 Aqua Mist