FiTech EFI system

So I stabbed in the new MSD and connected it to the Fitech leaving all other wiring connected - alternator voltage regulator, ECU, coil, and ballast. Changed the Fitech to VRCoil for the ignition. Car won't start... No signal to the coil. For giggles, I plugged the original dizzy wires to the original Mopar and just set the dizzy on top of the engine. It fires right up! I time it with a timing light to 10 advance at idle, play with handheld, and let it idle and rev for 10 min, and it sounds great. Disconnect the original dizzy and the car dies - no spark from the coil to the MSD.

So it appears I need to ask some of my same questions again...

1) What do I do with the original dizzy wires that came from the ECU (orange box)? It appears I cannot just "safely" end them.

2) What do I do with the ballast wires (start/brown and run/blue)? It seems to run fine(?) with the ballast as is, but I still don't understand the GM HEI discussion above as I didn't think the Fitech could run the timing with the HEI module. Will toss this if I go with the 6al.

3) What do I do with the voltage regulator. It has one wire from the alternator and the other to the blue/run wire of the ballast. If I go with a 6al and remove the ballast, does the blue connect to the small red (switched ignition) of the 6al?

4) What do I do with the ECU? Thinking of tossing it in favor of a 6al...