At a minimum boost, pyro, and trans temp in the cooler output line. Those are the most important and the ones you will watch consistently. LP pressure, rail pressure, and turbo drive pressure are also extremely informative and help monitor how things are working while allowing you to adjust driving tactics.
Display is really up to the individual and how they want to use the gauges. Personally, the digital monitors do not work as well as a good set of analog gauges. The digital is hard to see and interpret at a glance while not having enough space to display all the info accurately. Having to jump between gauges is distracting while driving and just not as good experience as a quick glance across the dash, pillar, or rear veiw mirror. There are excellent choices for gauge pods in all 3 locations that are easily scanned and in the normal visual scanning locations.
Doesn't matter of your stock or powered up, the gauges give a lot better feel for how the engine wants to run and where the problems can be.
Ideally you want gauges first so you can familiarize yourself with the stock performance. Whne you start making changes you can see where they are going and the effect it has on the operational parameters. For quick diagnose and monitoring nothing beats a full set.
The trans will be problematic with power and towing that weight. It is already borderline with stock power, a little Smarty just pushes it over the edge. Especially if you use the power where needed.
A shift kit or VB is a MUST have. The stock pressures just will not support power and TQ modifications. It is the key piece to keeping the trans happy. Next is the front servo, accumulator and fornt band apply linkage. Too light and sloppy for advanced pressures and more power. Lastly, the TC is too loose and the stock lockup clutch borderline. Heavy towing wears it fast and with an EB is totally inadequate. TV pressure algorithms need modified to handle the extra TQ with less throttle.
My experiences tell me that short of total rebuild the following is about the best compromise to protect the transmissions and make it reliable with extra power:
Single disk TC - lower stall, better efficiency, better clutch material
Shift kit or VB
Billet front servo, billet accumulator, billet front band strut and anchor
Rigid front band
When you do the front band plan on having the clutch packs rebuilt with Raybestos High Energy frictions and new steels. They are right there when the front band is replaced and take the brunt of abuse, worse towing.
Since your in DFW area James Northrum in Midlothian would be a good resource to have a chat with.
Good luck.
