Brake shoes help (8 3/4 BBP)

I used the 10x2.50 BBP rear brakes from the backing plate out from a 74 dart parts car 7.25 rear on my 8.75 axle. I used 10x2.50 finned drums off the back of a 79 cordoba 8.25. Kept the smooth 74 dart rear drums as spares.