To do it right, you gotta get technical. Need to know the BTU rating of the evap coil. Then match the compressor/ condenser coil and the expansion device to the same BTU rating. Can prove to be somewhat expensive. Your unit probably has a 3/4 h.p. compressor. This is pretty big for a 2 door unit. Probably too big, but again, gotta get the technical on all that stuff.