B body rear axle in an A body
15x10 w/ 4” BS with a factory 8.25” and springs moved into the frame rails. No mini-tub.
From just rough estimation the 15x8 Rallye with 4.5” BS should work. The 69-70 B rear is 4 7/16” wider. That’s about 2 1/4” wider per side.
The 15x10’s are 6” deep and 15x8 Rallye should be 3.5” deep. The 15x10 Welds are 2.5” deeper. So I would have .25” more clearance at the wheel opening.
15x10 w/ 4” BS with a factory 8.25” and springs moved into the frame rails. No mini-tub.
From just rough estimation the 15x8 Rallye with 4.5” BS should work. The 69-70 B rear is 4 7/16” wider. That’s about 2 1/4” wider per side.
The 15x10’s are 6” deep and 15x8 Rallye should be 3.5” deep. The 15x10 Welds are 2.5” deeper. So I would have .25” more clearance at the wheel opening.