I installed a complete factory AC into a 72 Charger which left the factory with no AC. Problem was that the AC and no AC cars firewall is different. I had to make a template and weld holes closed and open new holes. Very time consuming. You will have the same problem using a system from any vehicle. from here forward, I will only install aftermarket systems under the dashed hooked up to factory vents for correct appearance. I heard the Bouchillion sell brackets and what not to mount a sanden compressor under the hood. The in dash components are quite compact too. I attached a picture borrowed from Muscle Car Restoration (MCR)site. System went into a 73 Charger. Just my opinion.