My .02, and I get why you are here, is that there are some cheaper solutions you could try because I think the root complaint is likely accelerator / transmission lag. So a chip or messing with the accelerator are good options that don't involve ripping apart your engine.
And the Pedal Commander is $300, there's other options as well (2 in this thread). That one just seems to be the name brand now. Pickup guys love the damn things.
Or supercharge a 3.6L, which would be pretty fun. Plus you could do a manual. Whooo.
Anyway, good luck, peace out, etc. Don't start looking at inductive sensors because that seems to be one hell of a rabbit hole.