After Market 4.5 inch A-body 8.75 Rear Drums?

If you want to use the 1.75 backing plates and redrilled axles, ford ranger drums are the closest fit I have found. I put them on my sons 72 Swinger. You may need to grind the lip of the backing plate down 1/8 inch or so, or it may drag on the drum. Ours have been on for year and a half with no problems. Good luck.