B body rear brakes onto A body axle

Finally procured the correct rear 8 3/4 A body axle for the Duster. My previous rear axle was a B body 8 3/4 axle with a width of 55" The spring pads on the B body axle are 44" apart. This was run several years with not too many issues. One issue is the A body springs have a 43" spread, leading to rapid bushing wear, and splaying of the leafs.
Redrilled the factory A body axles to 4.5" and installed the 7/16" studs. Problem is the B body 10" backing plates, drums and brake hardware are 2 1/2" wide. This leaves the B body drums sticking out about a quarter inch from the A body axle. When I check the auto parts store, the widest 10" brakes and drum for an A body axle is 2.25". Question is do all brake components have to be replaced, (backing plate, hardware, drums) to get a the drum flush onto the axle? or can I just replace the 10" x 2 1/2" brakes with 10" x 2 1/4" brakes and get the A body drums? Anyone run into this issue?
Thanks in Advance