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How much R134 goes in A/C?

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I recently installed a Classic Auto Air system in my 65 coupe. It went real smooth, I'd recommend the kit. Anyway, how much R134 should be charged into the system? My mechanic took a guestimation and put one pound in. It blows cool, but not really cold in the 80 degree Arizona weather we had today. I didn't know if anyone could give us some insight.

John Thomas

65 coupe pictures:

66 Convertable pictures:
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