superbuickguy
Explorer
FYI, the rear disc swap is the same weather you are running 3/4 ton calipers or Caddy calipers. The calipers are the same size and interchangeable. That said, I would skip on the disk brake swap. I have them on my suburban, and am really leaning towards going back to drums.
the truck calipers have larger pads, are for a 12", not 10.5" rotor. The truck calipers are for a wider (thicker) rotor. And while I haven't marched down to my shop to measure the calipers, I'm pretty certain the bolt spacing is different as well.... but we could be talking different cadillac rotors (which are the same as 85-87 IROC Camaro, 88-91 are different)... the cadillac rotors and calipers are also the same as the 79 Firebird... again, completely different animal than the full size truck calipers that is the common swap....