HELP please - Air Conditioning

[GARMCo]

Hello-- have a 1973 Chevy truck. Am restoring the air conditioning system. I'm installing new compressor, new hoses and & new accumulator. Using my old condensor & evaporator. During my resto. I want to convert over to R134 refrigerant. Can anyone recommend conversion kit and/or walk me through the process? What type of PAG oil do I put in my new compressor ? How thoroughly (if any) do I need to clean out any old oil, etc. in the system ? ANy assistance is GREATLY appreciated. -- TM (garmco)