That sounds easy enough on the IAC.

The dizzy will not work that way. It gets power from the main relay that controls the MS and then grounds to the MS grounds. The two triggers go to there respective terminals at the MS, or just one if that is how you are signaling. The shield gets grounded at one end only, generally the MS grounds. If they get grounded at each end they become a ground loop and will amplify the pulses within. Not what you want. If you have these wires from a donor harness this is already done for you.
Run a separate power wire to the coil, same source is fine.