1974 Dart Sport “Desert Rat”

You're welcome. The reason I said to get all new hoses rated for 134A refrigerant is the old AC hoses for R12 will let the 134A seep thru very slowly. New hoses made for 134A are shielded with something to prevent that. You may need a bigger condenser for the 134A also. When I converted my old Challenger, I bought a complete underhood kit from Classic Air. The car was a factory AC car, so I rebuilt the heat/AC box with all new gaskets and stuff from Detroit Muscle. Jim's stuff is better than what Chrysler put in them to start with....lol.