I have a 1988 240 with weak a/c. I'm considering the 134a conversion vs just adding some R12...but i can't find the low side fitting where the refridgerant needs to be added. Anyone know where it is?

Thanks,
Chris

 

Both the high and low side fittings should be on the back of the ac compressor, if it is stock. The high side is usually the one closest to the engine.