Installing Old Air Products a/c unit in 1972 C-10 a/c cab truck pt1

My 1972 Chevrolet C-10 Cheyenne was an original A/C truck, but it hadn’t worked in decades and I decided to install a new unit. I ordered a complete ‪@oldairproducts6242‬ unit from ‪@Lmctruck1‬. This is my attempt to help the next guy by making an instructional video.