Which AC/heat system and why?

340sFastback said
Thanks for checking. Looks like what Nostalgiac Air sells:

1970 - 1982 318 340 360 Dodge Chrysler Compressor Bracket

Only thing Classic Auto Air sells for '69 and back cast iron water pump is belt goes around crank, AC, and PS. Thats what they sent me but not able to find anyone who can say how that one worked out.
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I don't see why that would not work fine. My belt goes around three pulleys, one of which is adjustable (the manual idler pulley). Yours will also go around three pulleys also, one of which is adjustable (the PS pulley). I'd be fine with that.