A/C Wiring with 5.3 Swap questions!

[jrstallion51]

I'm going to be adding vintage air to my LSx swap in my '70 C10 and I'm planning on running the a/c wiring through the computer so that the e-fans and idle can be controlled by it. The engine is a 2002, drive by cable, 5.3. I read on some posts that only two wires are needed at the computer: the a/c request wire and the a/c relay control output, however when I look at the pinouts, I'm seeing two additional wires both coming from a/c pressure sensors. I'm planning on running the VA's safety switch to make sure I don't burn up the compressor, but do I still need the pressure signals at the PCM for it to function properly?