Just saw this for the first time and I spit out my drink.
I hate to write this, but I have to...kind of. This is like the scenario where the woman keeps going back to the guy that is either cheating on her or beating her. She cant seem to move on.
Guess which one is which?
All kidding aside, I would find a good aluminum block and bump compression. I only run e85, so that isn't an issue. I'd also address wiring issues and not worry about going to a stand alone as that just introduces a ton of other potential wiring issues. Stand alone isn't necessary for what you are doing. Just my opinions.
My issue with the factory ECU is I have no way to data log or tune it. SCT is absolute garbage. The factory ECU is also unable to support any type of Flex-Fuel. If I had a GM Ecu and HP Tuners, sure; I'd go that path. But right now, much options seem non-existent.