7 1/4 rearend brakes swappable on to 8 3/4 ?

Generally the 7 1/4 have very small brakes so I don't understand why you would WANT to

This, really, is a paradox that has bothered me for decades. "The family man" buys a low Chev Biscayne, a moredoor Belvedere, a trimless Ford and a six. Then loads it up with the 4 kids, dogs, gear, camping, trailer, boat, whatever, and even though it's a "six" it will still do 65-70 and has a LOT of weight in the car.

But the manufacturers, ALL of them, "figured" that the "big block buyers" needed "more brakes" so the larger the engine the bigger and better the brakes.