SBP to BBP
FWIW, My '69 axles were re-drilled back in the 70's. Screw in studs only on the stock flange. The 4' pattern was filled. For the 10 X 1-3/4 brakes the drums were re-drilled as well. Never had an issue with them.
Moser was selling stock length Abody replacement axles with the 4-1/2 circle or the 4" circle. A little more meat on the flange for press in studs.
FWIW, My '69 axles were re-drilled back in the 70's. Screw in studs only on the stock flange. The 4' pattern was filled. For the 10 X 1-3/4 brakes the drums were re-drilled as well. Never had an issue with them.
Moser was selling stock length Abody replacement axles with the 4-1/2 circle or the 4" circle. A little more meat on the flange for press in studs.