[Mike C]

Other than finding an original No-Slip, the Detroit with the 14 bolt shafts is the only option for the Eaton.

It really does make sense to just R&R the whole thing if you want more options and that’s easier if you have a leaf spring equipped truck which is likely if it’s a GMC.

Bolt-in Dana 60’s are out there and common in 3.54 gear sets from big block trucks and if you don’t work it hard, the semi-float 14 bolt also makes a good replacement in addition to the well know full floater.