Glad I have it now, but if the Duster had not been a factory A/C car, A/C would not of been added when built. With the original A/C interior components, all it took to convert to R-134 was an OEM / Year One replacement condenser, a compact Sanden compressor, new drier and lines.
Same with the Butch Leal 72 Duster, it was a factory A/C car but all it got was the Sanden compact compressor, drier and lines instead of removal / deleted.