74 RV-2 Compressor, Discharge Flange O-Ring

On the discharge hose off of the compressor, the flange that connects hose to compressor has an o-ring in a recessed groove. Where can I find that replacement o-ring? I had a leak there and need to repair.

I'm also using 134-A. Do I need to be concerned about o-ring material?

Take the o ring to a place that works on A/C systems. I think material is important , the orings that came with the compressor for my Ram were green.

Success at NAPA! Their part # for the o-ring needed is 407171. The gasket part # is 207182 for non o-ring applications or flanges, or at least I think so.

Remember to ask for an older guy when looking for this stuff!