[tdangle]

Originally Posted by Andy4639

If you have all the factory AC stuff go back with it. All you need is a few parts to go to 134-A.

If you do the factory AC right and have it charged up right you can have 134-A in it and it will work just fine. But you will need to swap some parts out. Here is my old 305 motor with stock looking AC with modern guts. It blows 38* air on low. It's running 134-A. Good air flow through the radiator and good fans make a big difference in AC performance.
Making sure the hot water is closed when AC is running makes a big difference in cab temperatures.
Keeping the air flow on the condenser, there are many small things that help get the cab cool.

Hey Andy,
Was that at kit you bought or something you put together?