I have the three knob hvac controls, and know there would be probably some hvac upgrades needed? Is this even possible? Just curious. I am happy with the 12" I know it would impact some items I don't have like, seats, hvac, etc..... I have a tradesman 2 equipment group which upgrades the 5.0 to 8.4....Just curious. 2020 Ram 2500 Crew Cab LWB 4x4 6.4