Disc brake donor cars (bolt-on):
'68 -'74 X-body (Nova, Omega, Ventura, Apollo)
'67 -'72 A-body (Chevelle/El Camino, Cutlass, GTO/Lemans/Tempest, GS/Skylark)
'69 -'72 G-body (Grand Prix, Monte Carlo)
'67 -'69 F-body (Camaro, Firebird)
Keep in mind the '67 & '68 cars have the expensive to fix 4-piston calipers and hard to find (no new ones available that I'm aware of) disc rotors. Be sure to use your steering arms with any of these spindles as mentioned above.