a/c dash driver conversion

[chessie4905]

you are fortunate to have that  Frigidare compressor. GM started using it in 10 of millions of it's  and many other brands of cars. First used in 1953 Cadillacs. Extremely versatile. GMC used a tandem set in 4905's as an option. They can be run either direction and have been run with various refrigerants, over the years
Max btu output of a single unit is around 75k, with equivalent sized system and compressor speeds.
It is listed as an A6- Frigidiare, Harrison, Delphi and several brand rebuilders. You want one with compatible seals for the refrigerant you intend to use. Do some research on this unit and find everything you want to know and more. As far as the taps, follow the lines. Either at compressor, receiver drier, or Conde ser. They were usually located for accessible service.

[luvrbus]

If his system is same as mine was,they are a high pressure system and the average automotive gauges will not read high enough to charge the system