I concluded with a definitive “maybe.” Specifically, I said that “If I can’t find a non-custom-machined two-groove […] ...

Classic Air's Original Air Group is dedicated to designing direct-fit upgrade A/C kits using modern R134a refrigerant (it’s no longer called freon!) in classic Pontiacs.

Remove the grille and hood latch assembly to gain access to the A/C condenser. The condenser must be removed in order to replace the condenser-mounted drier assembly.

Other upgrades that may improve A/C cooling are a parallel flow condenser, a modern compressor and electric radiator fans. R-134a systems also need to use a different desiccant, such as XH-7 or XH-9.

The air-conditioning condenser is a radiator positioned between the car’s grille and the engine-cooling radiator in which the gaseous refrigerant sheds heat and returns to a liquid state. The ...