A/C Question

i changed mine on the duster from that big 2 piston to a rotary about 20 lbs lighter, but had to change bracket as well, i pulled brackets from a 89 dodge pickup, then the alternator had to be changed, but went from a 40 amp to 80 amp alternator, then went to Napa had hoses made up to fit, everything cost about $400 including hoses compressor, alternator and brackets , i had it changed to lose that big ugly compressor, and to get to the 134a , happy with the change, if charging remember to purge all the old refrigerant and use the correct oil, and the right amount of 134, because it don't use as much as if using the 12 or 22. Also i would recommend changing the drier, its not that expensive.