Use the AAC plug for the new idle valve.
You cant use a MSD6A with coils that have built in ignitors. The MSD is only good for a single coil/distributor. The Expansion loom gives you the 6 coil triggers, the 12V will have to come from an ignition switched relay and the grounds should all go to a single point on the cylinder head.
Yes trig 1 is crank and trig 2 is cam. You really need to look at a data sheet for the new sensors to determine what the colours mean, but typically for a hall senor with those colours I would expect Tan would be +12V, Black is ground and blue is the signal. I have attached a pic of the CAS pinout below. So both tan wires would go to the "CAS supply". Both black wires would go to the "Sensor ground". Crank blue goes to Trig 1 and Cam blue goes to trig 2.
