FiTech EFI system

Wow! A hearty thank you to all of you that replied.
Bill - good question, I had the same feeling the other day as I hung up the phone.

So I just got off the phone with Bryce, their tech, same gentleman I talked to the other day. Full disclosure - I am not by any means an automotive electronic tech so bear with me if I seem to gloss over anything.
The ECU gets its power and self learning maintenance wired to the positive terminal of the battery. 30 secs after key-off the ECU shuts down, so after that time you can activate a kill switch, remove the battery, etc. and the ECU won't be affected.
I was assured that the switched 12V from the ignition switch works for the FiTech system. Alternatively I can splice into the power wire going to my Pertronix dizzy. The explanation jives with the responses above.
So I ordered the TBI and FCC; there's currently a 3 week b/o on the FCC.