Anyone know if 7 1/4 brakes fit 8 3/4?

I have brakes from a 74 Duster 4"bolt pattern, will they fit a 4" 8 3/4?

Thanks,
Mike

Hi Mike!

I'm pretty sure they dont fit!

The backing plates are different between the two. The 7 1/4 axle has 4 bolts for the shield while the 8 3/4 has 5 bolts. I'm not sure about the brake shoes. The wheel cylinders are different too.