Ditto on contacting "Old Air". The first thing you need to determine is whether it is intended to be used with an expansion valve or an orfice tube. HVAC systems are pretty simple- - - - -evaporate refrigerant inside the passenger compartment and absorb heat, then pump the gas to the front and condense it in front of the radiator to remove the heat. "Repeat as required". What you've got is the evaporator, and a pretty wide selection of compressors and condensers should be able to complete the setup. Definitely hang onto it- - - -even if you just take it to a swap meet somewhere. Somebody will want it, and maybe pay you well for it!
Jerry
