Brake swap caliper question

They both came off the same car so I guess I better pre fit and see if the hoses will fit. Maybe gotta buy new calipers. Anyone know if they are still available and if so where?

The 73 and later calipers are the same as the b & e body ones... There were two styles, pin or slide... Once you find out which one it is, I bought some at Napa a few years back...