I would avoid 1977 hornet brakes, They are different from most other years, very hard to find used rotors if you need them and the new ones are expensive and in my opinion poor quality. Your choice of brake linings are very limited as well. I did get rebuilt calipers pretty reasonable from napa, but were sticky and did not release properly. Rebuilding brake system on my Hornet AMX was he least fulfilling work I have ever done on an amc and yes I have changed the water pump on the side of the road in V-8, A/C, power steering, smog pump, car Holekamp