redrilling front hubs

My car has 10 inch drums. I had mine drilled to 5 on 4-1/2. Just make sure they use an end mill on the back side to make a flat spot so the stud pulls up flat to the hub. You are only moving them 1/4 inch. I thought they had screwed mine up because it shook like crazy. After some research, I found the hub that comes through the center of the wheel is a smaller in size than the ones drilled for 5 on 4-1/2. The hub is what centers the wheel and the lugs only capture it. You can buy what is called a wheel centric ring to fit your hub / wheel combination that will fix that problem. If you can't find exactly what you wanr, go with one that fits the wheel and is too small for the hub. The machine shop can turn them out to the exact size you need. Mine run very true now. Very pleased.
Tom