does anyone know where you put the oil in the compressor,in a R12 sys. The system is open and compressor on my bench.I"m thinkin it might go back in the 2 openings on the backside.

Thanks

Sneeekers

Also would like to know the gear ratio. Car is a 71 Elky non SS had a 350/with 2 barrel carb hooked to a 350 tranny