B-Body Axle?

I know Bad Sport. I discovered the same but my spring perches are 43" and one chart I looked said they made some 8 1/4 A-body setups. By my measurements, everything should fit but time will tell. Now I am just trying to find the correct brake shoes for the unit!
DR

Dartnut is correct, and by your measurements it sounds A body to me.

Just go to a GOOD parts store, not one of the big box stores, and a good parts guy should have no trouble getting you the right ones.

When I put my B body rear in, I had no idea what it came out of, my parts guy is sharp as a tack and had no trouble getting it right the first time.