The gentleman I purchased my 3A from installed pre-1978 Ford Bronco drums, shoes, and backing plates, front and back. He claimed everything went on without a problem, and without any special mods that I recall. I'd have to ask him for the specifics as to part numbers, etc. I'm running aftermarket 15" rims, though, so I can't say if stock rims would fit my current setup.
I can tell you this though...when you lay on the pedal, you stop, and fast!
I'd be happy to swing by his place in the next couple days to get the specifics, if you'd like, Artificer.