I guess it is on the red 60 or 61 truck in the other pictures? The rear cover looks like a Eaton HO52/72 axle. I agree with Lincoln that it looks like a dually hub. You sure the truck is not a C30 (1-ton)? I think Chevy still had the HD 3/4-ton option with rear duals at that time. Good luck.


Professional Novice