need brake backing plates for new bb axle swap

The small bolt brakes are 10x1 3/4 I think and there are no drums with that brake size in large pattern. Know what plates your geting so you can get the correct drums and brakes. I would go with the set up Physixx has. It makes for zero guess work. The C bodies used 11x2,11x2.5,10x2 1/2 and so did most B bodies and trunks/vans