Thanks for the tip, Dusty. I'll be sure to leave the slider in defrost mode at all times.
I changed the refrigerant to R12A, Hank. It cools great with no additional modification, takes less product to charge the system and doesn't even need vacuum to charge. Since the bulk of the system components are at the open front of the engine bay (not near the headers) I am comfortable running an isobutane based refrigerant. On my M6, the A/C lines run all along the "hot as hades" headers. I am NOT comfortable running R12A in that case.
Jose
