I had the housing work done by a local shop and it cost me $110 for shortening the housing, welding the axle tubes to the center section, new - relocated perches and redrilling the new drums for the 5 on 4.5 pattern. Rear brakes are 11x1-3/4" I think, drums had the 5 on 5 pattern. That was the setup off that 66 F100. I ordered all new brake stuff from RockAuto. Nice to build one and not have to be concerned about it, knowing it will handle whatever you can throw at it. "Overkill" = peace of mind.