Probably could be
Or machine the backing plate
But like you know those parts are getting rare
Shame to modify anything original these days

The same 14 inch diameter 1953 gm brake pad for the 1 ton was used all the way up to 1987 on the c50 2ton trucks as a front shoe
I wonder if maybe that 87 front drum could be adapted to the rear of the 47-53 1 ton
I wouldn’t feel as bad modifying newer drums as experiments
Perhaps all it would need is some new stud holes and a spacer to work
-s