2002 transplant, Vintage Air and AC signals to computer

[general23cmp]

I am transplanting an 02 truck engine (I believe that is an 411 PCM) into an old truck and will be going with Vintage Air. I am thinning out my harness. Obviously there are several input/outputs for the AC to the computer. Which of these should I keep (if I can) to tell the computer the AC is turned on? Also, does anyone know, providing I can tell the PCM that the AC is on, whether the computer automatically turns on the electric fans when it sees this signal? If so, are they on low or high when it does this?

The goal is to have my computer know that AC is on (for idle, etc), and if possible, turn the fans on to help the condenser. That would avoid an additional relay, diode, etc type setup external to the computer when the AC is turned on. I know there are also relays required for normal operation.

Thanks.