I see that you are not convinced. I did not say all of them were NOT configured to to fire bank to bank, only most of them. Did your brother write the programming for all the different systems out there? I don't know how much you know about fuel injection, but I do know what I know and I hope to prove you wrong with the successful completion of this project. In the meantime I offer the following article for your consideration. Seventh paragraph to save you time.

http://www.chevyhiperformance.com/techarticles/49279_fuel_injection_basics/index.html