80 St Regis parts for Cuda

Anyone know if the st regis (r body) cop car disc breaks make a good swap onto 67-69 barracudas? I found a pair of these cop cars with 360 motors, 727 trans, 15" wheels and firm feel police steering units - which I wanted to buy for $1000. The motors will be put in my 69 and 73 barracudas (both original 318/a904 cars), the disc brakes would be installed on the 67 formula s 383 and the 69 notchback. That is, if this is a good swap. I have purchased the late a body disc setup (slider caliper version) and done the swap on my road runner, but cannot recall hearing about r body swaps.
I know '80 360 motors, even in the cop car, are probably severely detuned - but guess that even these motors would respond well to basic upgrades (street performance cam, dual plane alum. intake, headers). tips and suggestions appreciated.