Anyone convert from R12 to 134a in factory 1965 Valiant/Barracuda?

I will be adding the factory underdash AC to my 65 Dart wagon and a modified system in the engine compartment. Will be using a Sanden compressor already set up for 134. The reset of the underhood components will all be stock-looking and set up for 134 - 134-compatible O Rings, rebuilt factory horizontal drier, the new compressor and getting the factory hoses rebuilt to be compatible with 134.