The previous owner removed removed all the vacuum lines and vacuum canister. It was a original AC Chero so it had the hard to 2 inlet heat control in the engine compartment. I replaced the heater core and rigged a heat control. It seemed like the heater was on all the time. Recently the new heater core went bad. Finally to my question, has any removed the heater box completely and installed a universal heater box? I just want to get heat in it until in it for now.