You might consider Porsche 993 or 996 Brembo calipers with Wilwood hats and the appropriate rotors. These look pretty much like the Brembo calipers in the kits. The 993/996 have about the same weight distribution as a Pantera, and a heavier, so these should be a good choice. The Porsche guys like to upgrade to "BIG RED" brakes, or even the high $ ceramic brakes, so used calipers are on ebay all the time. The 996 calipers are probably a little better because they are monoblock versus bolt together, and both the front and rear are radial mount, making adapters easier. You're looking at under $2K, so it isn't too bad. You can use front calipers all the way around if you like the look, but I think they are overkill in the rear. I have 993 calipers that I plan to use.