CAS wiring...
 

So I'm doin the 97 CAS wiring for my MS 1 on my 99. There are 4 wires...12v, Ground, and 2 signal wires (CKP and CMP.) The signal wires go to my MS of course, but can I wire the Ground and 12v wires to my parallel harness?

Yes, you could.

Alternately, You could simply run the ground wire to a ring terminal on the head/IM, and pick up +12 by splicing the white/red wire at the MAF sensor connector, the fuel injector harness, the existing crank and cam sensors, the EGR valve, or the VICS valve.

Megamanual says to run all sensor grounds to the "sensor ground" pin on the DB37 connector, I did this and have no issues. Does this matter? I dunno, but I don't want to find out the hard way.

I patched +12v power for sensors to the main MS power line, again no issues.