Backing plates, A Body 8 3/4 10x1-3/4"

Dew said
I know that it’s the only difference between them

Then you would know that those are the only ones he can use, due to the unique A body only axle offset. And he can only use the 1 3/4” brake shoes, also an A body only width, Fury would be at least 2”, probably more like 2 1/2”