Chart for 8.75 axle flanges?

I have a set of original A body SBP axles (top) and a set of LBP axles that are the correct overall length to fit in an A body axle (bottom). The angle from the picture throws it off, but the brake mounting surfaces on the right are fully lined up to show the difference in the flanges on the left, the distance from the bearing retainer flange to the drum brake mounting surface is different on both. I fully expected this and it doesn't surprise me. The difference in distance isn't a lot, 1 15/16" for the SBP and 2 1/8" for the LBP for a difference of 3/16" or 0.1875" total. While I know I COULD make these LBP axles work with redrilled SBP drums and hardware... I know that I SHOULDN'T. And even if I did, I would likely end up upgrading it all in the future anyway so might as well do it correctly now.
My question is, now I am not sure which brakes I should be looking for, rear brakes from a B or E or C body. There is a local deal where someone has some C body brakes that I was considering but I don't know the difference in measurements and if they will work. Is there a chart that shows the measurements that I listed above so that I can determine if I have axles that will work with either B body or C body brakes.

Any help will be appreciated
axles.jpg



P.S. I am fine with drums in the rear as a cost saving measure, but if you have any cheap junkyard disk brake options I will be fully open to that as well.