It was first used as a universal A/C system back in the 60's son. Search a little longer. Vintage Air sells a clone of it.
His question is obviously vague or you would answer it.
We just need a little more info, not an argument.
One more second would have revealed
this
We don't know if he is using an old York compressor or a rotary, Sanden or other..and you don't either.
Hopefully he will help us help him. Jimmy came back.......over