under dash a/c

What you have is a heat exchanger, with a blower fan. It should also have the circuit wire that goes out to the compressor to engage the compressor clutch.

What you are missing is the heat exchanger that sits in front of the radiator, the dryer (mine is attached to exchanger), the compressor and mounting bracket and belt tensioner, maybe a 2 slot crankshaft pulley, hoses, and a drain tube from the Frigidare through the floor.