Thanks Bill. If I lose this supply of r12 - I’ll likely switch over to something else like envirosafe or Duracool. Since I have the r12, and the system has never been converted I’m going to give it a go.

So - small update. Picked up some fittings at HD to mate my compressor to the manifold hose. I’ve had my system pressurized at 130 (I only have a 150 psi compressor and my air blower attachment is rated at 90). I was afraid to push it further as the low side gauge was getting pinned to the max (retard) levels.

It’s been sitting several hours and I don’t notice any leaks yet. Needle hasn’t visibly moved yet... maybe a molecule or two? In any case, I’m really hoping that whatever leak there is (and I’m sure there is a slow leak somewhere right?) will be resolved with the new orings and such. Waiting on some parts for now. We’ll see....