Many guys have A/C with the 3800SC. The PCM controls the A/C on these systems and takes inputs and sends outsputs to run the system. Its a matter of adding a three wire refrigerent pressure sensor to the highside line ( inpuits fed to PCM) , feeding the A/C request signal into the PCM, and taking the A/C relay signal from the PCM that switches in the A/C relay which in turn energizes the compressor clutch.
As soon as we get the current project car out of my garage I'll be starting my A/C systrem. If all the rules are followed it shouldn't be a problem.
87GT - with 3800SC Series III engine, 4T65eHD
87GT - 3.4L Turbocharged engine, modified TH125H
" I'M ON THE LOOSE WITHOUT THE JUICE "