F-Body Police brakes on an A-body

you need the F body caliper adapter brackets and rotors too. you end up with larger rotors that i'm not sure if they fit in 14" wheels.
and that's the 73' up spindles.
question is, do you need the larger brakes. are you getting brake fade with what you have? are you running enough tire to make use of the larger brakes? is it worth the extra unsprung weight?