The A/C core in the Gen 2's appear to be in a separate housing to the heater box and blower fan so it should only be a case of undoing the clamps either side and leaving the A/C core untouched. The Gen 1's sort of had A/C as an afterthought and weren't as integrated as the HVAC on Gen 2's. I haven't messed with Gen 2's so someone here will have insight on how to disassemble it without removing any gas lines.