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Re: How much refrigerant do these things hold?
Below is a picture from my 69 that says 3.25 # of R-12 on a sticker placed over 3.75# printed on the label itself. I think the later years didn't have the sticker and had the 3.75# exposed. The difference may be due to the fact that one of the hoses was longer than in 69 (69 and earlier hoses also used gear clamps rather than being crimped). I'm not sure how 134a weight compares to R-12 weight per unit volume.
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