Hub drilling

I didn't read every reply, so that said these are my thoughts. There is no problem with drilling the rear axles/drums, and front hubs/drums from 4 inch to 4.5 inch. I have been doing it for many years and cars. I made a drill fixture to make it easier. The hub and drum are pretty critical to get correct (the new holes must be located correctly and square to the flange). The drums are not critical at all. The holes in the drums can be "sloppy" (and, yes, new drums will have to be redrilled). Must use the "A" Body small bolt pattern drums.