I think you are making a mistake, Sam.
A centri blown 2v is one of the easiest FI combo's to tune in the entire automotive scene. Boost comes on smoothly and predictably, allowing you to easily adjust the MAF curve or injector slopes, and giving you plenty of time to let out if the AFR goes lean for whatever reason. They are also much more forgiving than other combo's for timing advance.
Despite that, you never had a competent tuner touch your car. There were multiple underlying issues throughout your entire build that needed to be addressed, such as your voltage drop at high RPMs, your fuel pressure drop, belt slip, pegging your MAF, and in the last thread I read you mentioned it going lean in upper RPMs. Instead of addressing those, you added another power adder in the form of nitrous, further complicating the equation.
Your shop was not competent enough to install a return fuel system correctly, do you really think they can manage a Coyote swap? What I forsee happening is you getting the car parted out, the shop being completely overwhelmed with the Coyote swap, and you being plagued by issues for several months before selling the car as a roller and moving on.
This could also serve as a wakeup call, however. You live in the state with one of the best racing scenes in the US. I know there has to be good shops in your area, even if you have to drive a bit. Take the car to someone who doesn't have rocks for brains and have them diagnose what is broken. Fix it, address the other issues this car has had for years. Then added an 8rib kit with a JT trim blower instead of that puny SI trim, take the car to AEM or another REPUTABLE tuner IN PERSON, and enjoy knocking down 700+rwhp without worrying about nitrous.
OR, alternatively, part this car out totally. Send the body to a scrap yard. Buy a new 2015 GT and add a bolt on TVS kit. Enjoy 9 second 1/4 mile times, 700rwhp, and AC with radio. Those combos are very predictable and are absolute monsters. I guarantee that you will be impressed with the power and comfort, and any REPUTABLE tuner will be able to make that thing run safe on e85 for years to come.
With that said, I've enjoyed reading your build threads. Whatever you do chose to do, keep us posted. Good luck man.
What does your dyno sheet trap?