So the two A-body widths are:
The small bolt 8 3/4 width and the late model A-body big bolt width.
So we know that the 1.75 wide small bolt brake backing plates wont work with a large bolt 8 3/4 axle. Because the small bolt and big bolt axles have different widths from the bearing to were the wheel bolts on. Using the big bolt axles widens the small bolt 8 3/4 width. Make'n it work with what I have, mentality.
The late model A-body have a different width, it is narrower than the small bolt 8 3/4, and allowing a 15x7 wheel to fit in a duster wheel well. This is the one I prefer because it has its advantages especially when shorting an housing.
8.75 a body BBP rears. Please do tell...
The 8.75 stopped production in 1972 SBP then swapped to the 8.25's, BBP, in 340 cars for 1973
52 5/8" flange to flange, all and every one was SBP, is the base measurement of every one I've ever had my hands on from 1967 to 1972 cars. With minor +/-
Yes, if you want an A body rear to have the same overall width (57.125) of the stocker ones, using BBP, the housing needs to be narrower to compensate for BBP increased brake stand off distance.
