Does anyone know how to fix the air conditioning in a 78 nova, it needs new everything

It very rarely needs everything. Or has someone removed it all?

someone has removed it all, I am trying to find a diagram of the a/c but having no luck.

Did they remove the case on the firewall? Or just the hoses and compressor? If they took out the case also the best bet is to find a donor car. Most of the ac parts aren't made for these anymore. I needed a condensor for mine and no luck. Had to find one close and make it work.

I got it fixed!!!! yeah because I live in Phoenix, AZ and it is like 110* outside. My dad replaced the compressor & condenser with new parts from autozone. He replaced the hoses with used hoses from an auto recycler. And it works wonderfully!!! We also got some parts from APPAK auto a/c specialty store. Thanks for your help.