Mustang Brakes?

I guess I should have mentioned this earlier, but the entire car will be big bolt pattern. We got an 8 3/4 for the car that currently has small bolt axles. We are in the process of having the rear (factory) axles and drums redrilled to a big bolt, and just get all new internals and such for the rear drums. The front brakes weren't reusable in any fashion. Spindles and all had rust and corrosion. The guy I got the car from said the car could easily also use b body brakes if that makes a difference. There are all kinds of mustangs in my area with good discs. Heck I'd even use explorer discs or something similar if I could figure it out.