air compressor ac conversion

what do i got to do on my 1994 fullsize 1500 to do the conversion get the in and out ports machined to fit brass fittings do i have to do something with a small screw inside the comp or something thanx

you can get these fittings from here

http://www.kilbyenterprises.com/compressors.htm


there for a york.

tt can i even use the stock ac compressor