Things to check are clutch gap and to see if it is freezing up.

If memory serves me correctly, there is a measuring tool for York compressors. It uses one measurement for vertical mounting and a different measurement for horizontal mounting. We used to be able to isolate the compressor by service valves and open the compressor oil plug and measure the amount of ...

Invert it to drain and also rotate the clutch hub. Pour new oil into the suction port and rotates it.

No you need th4e glasses depending upon the light.

not all UV lights are the same. Try looking at the condensate drain tube at night. Also, the dye and light you're using may require yellow glasses.

Corvettes are a poor choice for conversions. Four seasons are a poor choice for parts. You're dead in the water before you begin. You will need to upgrade the condenser also. Better do your due diligence before a decision is made.

You're brutal. Is that gloss paint or satin finish?

handwheels on gauges closed?

Take a relay apart and use it as a test. Make sure the connecting pins are making contact. You can use a clip lead to make and unmake the relay connections. make SURE you are on the correct terminals.

OK, so there is your answer