1972 dart swinger.... i have 5 on 4 bolt pattern hubs in the front and 8 3/4 rear.... i want to know if the hubs/ rear axles can be drilled to a 5 on 4 1/2 bolt pattern.. who has done this?
Yes, rear hubs and drums drilled out to 4 1/2. BUT you have to use 1/2" cap screws instead of pressed in lugs because the extra lug flange diameter does not leave enough meat on the axle flange if you drill it out to press in lug size.
Every new set of drum will need to be redrilled on that same new pattern BTW. AND you will be stuck forever buying oddball and expensive 66-72 10x1 3/4" small bolt pattern drums and brake shoes.