Yes, they will function the same. The only thing you will need to check out is to remove the EPR valve if it is present behind the suction port on the rear of the compressor. The B and C body bigger cars had an EPR valve, the A bodies up to I believe 1974 did not. The EPR valve (Evaporator Pressure Regulator) kept the evaporator from freezing up. The A body cars had a temperature sensing switch with a probe in/on the evaporator case to do the same thing. Check your shop manual for your year as 73-74 was the change over for this switch or EPR valve. Later A bodies went to the EPR system. IF you are converting over to R-134A refrigerant the temperature sensing switch actually works better as you can get a switch that is adjustable. The old EPR valves were calibrated for R-12 refrigerant although a few were also adjustable. New EPR valves today are quite expensive if you can find them.