O.k. I have talked about adding heat with ac delete box, but if I want to add a/c and heat what to I need? I know I am missing duct work. I have evap box that goes to the firewall, I have a compressor That I got for free not sure if it works. I think there a couple of silver I will call them diaphams aroun the left side kick panel. What else do I need? to make a/c heat to work? Was a orignal ac car. Will this be a pain with headers.