Wondering if they are the same for a 3.0 and a 3.5?

as far as the injection side of things go the manual only list differences between manual and auto. no reference is made to differences on a 3.0l instead of 3.5 that I could find

There would be some differences, at least on the AFM there are more pins on the later models (TH onwards) for the barometric pressure sensor (from vague memory) Also is the EGR valve electrically controlled? then the various differences with the TCL/cruise throttle bodies.

What's Jason working on I wonder.....

You can tell them, I wont spoil it for you :D

A plug and play loom for the adaptronic?

It was on my mind.

But if there are too many variations, I can't get all the plugs moulded cheaply.

Is this project in the dirt-scratching stage or looking hopeful? I would personally focus on the 3.5L. There are many more out there willing to mod. If that then pays off, then hit the 3L 24v. My 5cents :D

So what sort of packages and pricing are you aiming to market?