PolarBear thanks for making this post! Lots of good information here. I've been exploring this information for my truck as well but it will be a long while before I get to it. How long have you been using HP Tuners and how do you like it??? Have you ever used EFI Live and if you have how do the two compare? One other question. What all is involved in making the swap over to E85 use?
I'm glad to help! Hopefully this saves the searching and pouring over diagrams that I had to do.
I've been using HP Tuners for about a year now. Bought it simply to do this swap and learn how to tune. I've never used EFI Live, but I've heard they're very alike in what they're capable of, just different user interfaces.
In respect to E85, you can do it two days. One where you're using a fuel content sensor that allows both an e85 tune and an 87-93 tune. The way I did it was a 100% all the time E85 tune.
I really like how your project turned out, definitely unique. I did find a guy on hp tuners/ls1tech forum that converted a mark IV 454 to 24x using an 0411, was another fun project to watch.
Thank you! If you've liked it so far, you'll really like what happens next. Just got done fabricating a really nice turbo kit for the truck.