I haven’t attempted to add the leak dye and find it yet, but was wondering if there was any common leaks in the ac systems in these cars?

The system turns on and runs in or T/A, just doesn’t blow cold.

 

If the compressor still kicks on you have ample freon in the system, maybe just need a "top off."
The mating surfaces of the compressor can be a leak source, as can anywhere, really.
Put some dye in it, and if it leaks, you'll know where the leak is.

Silly question, IMO.

 

The compressor is an aluminum cylinder that slides into a steel sleeve. There are 2 large O-rings, the same outer diameter as the compressor, that seal the sleeve to the guts. Those often leak, especially if the steel sleeve is damaged (dented, warped, corroded, etc.). Watch a youtube video of a R4 compressor rebuild, it will make sense then. Also:

Welds where the tabs are welded to the sleeve
Compressor shaft seal
Hoses, especially at the ends: refrigerant literally comes out the ends of the hose
O-rings
Holes in the condenser from road debris strikes
Holes in the evaporator from corrosion