LOL Somehow I missed this. You are likely already set up OK. The same wire that is now feeding your MSD "trigger wire" (small red? red/ white?) is what goes to the small trigger wire for the EFI
Before you finalize wiring, tho, you need to see if voltage drop is a problem. If it is runnable now, get it warm and read battery charging voltalge at a "medium cruise" RPM. IF it is charging at much over 14V say, 14.5 or more, then you have a voltage drop problem in the harness
