what rotors fit?

As mentioned above, the 73 up A-body rotors are all the same, as well as the rotors on just about any 73-85 Mopar almost all of them had the same 11" rotor, Aspen, Valari, Diplomat, 80's New Yorkers etc. These rotors are also used in the street rod market to get the 4 1/2" bolt circle. (they use the Camaro/Firebird rotor for 4 3/4" bolt cir) The difference on some cars is the bearings so be sure to use the correct bearings and races for your spindles.

The 11 3/4" rotors came on the larger cars like the Magnum, Cordoba, Mirada as well as Taxi cabs and cop cars. You can use them on the A-body spindles if you use the correct caliper brackets but you can't use them with a 14" wheel.