Besides what TSolo said, what freon are you planing on using? Yorks were set up for R-12, and most A/C gauges sold nowadays are threaded for r-134a fittings- which are made different on purpose. The York has a separate oil sump like a single-cylinder motorcycle engine and the lubricating oils used with the two freons are different as well- and incompatible. Nothing wrong with using R-12 except the outrageous cost.
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