That's what my friends didn't want, deal with redrilling process and precision on the job, plus maybe get some weakness on hub. They already had some old damaged B body 8.75 axles around and the car came equipped with 8.75, so interchanged the hubs and done. Need of course to be at a machine shop... press, weld, machine however not really precission... but way easier than make the same job, plus precisision on a full axle assembly.
yes '73-'76 A body front disc apps were all BBP (single piston calipers) but '73-76 A body front drum brake cars were still SBP, at least some were (I've had several). not sure if any 4 wheel drum 73-76 A setups were BBP.
disc only were 4 1/2". drum brakes were ALL 4" bolt pattern. those cars were relatively new back when i owned a junk yard. we had hundreds of then through during 72-84 and ALL the A body drum cars to '76 were 4" bolt pattern.
Got it!
