Got the harness run yesterday - I still need to wire it into the truck, mount and wire my fan relays, and do my 2 position brake switch conversion, but that all should be pretty quick work this weekend. I'm pretty happy with the PSI harness for now - I am bit by the common complaint that the MAF connector branch is no where near long enough (and on the drivers side of the engine harness...) so I'll be getting a MAF harness extension. I know I could just extend the wires, but I'd prefer not to cut my brand new harness.
I also need to figure out what I am going to do for the oil pressure gauge. Gen 3 the oil pressure doesn't run to the PCM, just the gauge... I know there are some conversion options, I just need to research them. I'll probably replace my water temp gauge (aftermarket) with an oil pressure gauge and be done.