It's hot what AC system to use

Very nice info I did call classicauto air and they do have a kit that is a replacement for factory heat only cars not factory air with the push buttons and it will work with the truck compressor. You have to use the original controls they are not provided. Restomod Air is the sister company and they have realy nice bulkhead plates but there system requires you to flatten out your firewall mine is already running and painted and I am not taking it all out and starting over.