U joint issues

[64N53Kustomz]

Originally Posted by Captainfab

If the rear end already had the original trailing arm mounts on it and a panhard bar mount on the passenger side axle tube, it is a '63-'64 truck 12 bolt. The '65-'72 truck 12 bolts for the C10's have a boss cast into the center section for a stud for attaching the panhard bar.

Thanks for the reply captainfab but it had the mounts for leaf springs. I removed them and welded trailing arm mounts.