Ive looked at S&P. They're excellent for getting ideas, but it takes deep pockets to afford most of their stuff, a lot of which they are the middleman for. Their installations are excellenttho, if you want a show-worthy install.
For instance, their harnesses are actually done by Hotwire Auto www.hotwireauto.com You'll save around $300 going direct to the source. hotwire's ECU flashes are cheaper too.
I will stop there, but it always pays to shop around.

The non-working cruise is what I want to solve with all this research and figuring and whatnot. I've noticed with my dakota rental that it gets significantly better mileage with cruise on, meaning the torque converter is locked up. It's not just about having OD, when the converter clutch is engaged you eliminate the efficiency loss of the converter.

So really what I'm trying to do is find a way to have a module communicate proper vehicle speed signals to the ECU.