Hy Repair, are you talking about the bores the kingpin sits in, or the caps that bolt in place over the ends of the kingpin? If that much damage was done the axle may be bent, and the spindle could be cracked or bent, maybe you should look for another front axle. It is hard to tell if they used more than one front axle in a 67 C50, as the parts book doesn't reference truck model numbers, but talks about weight capability of axles. It appears that the 5000lb. axle is the same from 67 - 72 on C models, hope that helps.
