FiTech EFI system

2) What do I do with the ballast wires (start/brown and run/blue)? Some say splice these wires together to go to the coil+, but other say don’t or you will fry the stock coil. Since I have the Accel coil will a splice cause the coil to burnup? I need 12v power to the coil+ at least during startup. Also these wires go to and from the bulkhead – implications of splicing?

Depends on what ignition you are running. That is, coil + whatever ignition box.

If you have a GM HEI module, or other "coil negative switch" type ignition, you don't need a ballast for "some." EG I run a stock Mopar coil with a GM HEI and no ballast. So, "it depends."

MSD is completely different. They are a CD ignition, and do not run current through the coil. So, no ballast