66 Mustang GT Convertible, 55 Chevy Bel Air, 69 Firebird 455, 69 Nova SS Clone, 65 Mustang Fastback, 67 Mustang Convertible, 67 Camaro RS/SS
Everything I've heard says propane (Hychill) is less likely to leak than even R12. I would much rather have propane burn than a refrigerant burn. For example, burning R12 produces phosgene which will straight up kill you. Propane is also a lot better as a refrigerant than R134a, and doesn't have the problems playing well with others either.