I'm trying to decide what AC compressor to run on my project HEAVY HAULER. For those of you keeping up it is a 1973 crew cab. It had AC originally, but the compressor was not there when I got it. Should I use a rotary style, RV2, or york compressor for the AC system? Which would would be the best compared to cycling the freon and such? I can make my own brackets, so that is no big deal.