I see you have converted a truck to a/c . We are about to start the same process in a 1980 Chevy K20. We found the parts we need to make it happen and cutting the cab isn’t a big deal, it’s the electrical that will get me. Do we need to change the entire harness/fuse box in the truck to make it work , the system is out of a 1980 as well, are they able to recharge it these days ? Any insight would be helpful thanks !!