Would have had a tag on one of the cover bolts, if that's gone, take the cover off, Should be stamped on the ring gear (or count teeth on ring & pinion).


BC
1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc
1949 GMC 250 project in waiting
1960 C60 pasture art
Retired GM dealer tech. 1980 - 2022