I have new aluminum wheels for my '59 3100. When it was rebuilt my guy replaced the 3 rivets on the front drums with bolts. New wheels need to be flush to the drum as my original rims had dimples to accommodate the rivet/bolts. Rear drums don't have. Any suggestions? I'd hate to have to drill/mill some space on the new rims (American Racing/Wheel Pros). Can I do without the rivets bolts? I think they keep the drum on the hub in addition to the wheel bearing nut and washer. Any solutions or assistance would be great. Tim