Just bought a GM 10 bolt posi with 3:42 gears and am trying to identify what car it came out of. The seller thought a 68 Chevelle? Can’t seem to find it on google. The identification numbers are as follows. Either CCO 6325J1 or CCC or CCG. I have it sitting next to a 67 12 bolt and the upper mounts are quite different as well as the coil mount location. Thanks for the help.

 

Looks like

CCC 6325 1