I noticed a couple guys reading this thread again, so I went back through it. Figured I'd answer a couple unanswered questions. First of all, the problem with the old truck ended up being a blocked checkvalve in the fuel pickup, designed to hold the fuel prime. There was crud in it restricting fuel flow. I think this would have been obvious if any of the mechanics had done a fuel flow/ pressure test, but I guess it was more profitable to install new injectors instead. Oh well, it's only money.
On the new truck, I've identified a couple things. The switch on the dash above the radio is the light switch for the 5 marker lights on top of the cab. They do not come on with the headlight switch, they have their own switch.
In the bucket, that 'bag' with the red knob on top is an emergency hydraulic shutoff. It cuts off all hydraulic pressure to the upper controls and it came in handy last week when I popped a hydraulic line. I'm planning on addressing the line layout and tucking them in a bit tighter under the boom. They stick out way too far under the winch and are constantly in my way and getting smooshed into the trees.
Also, the two black knobs to the right of the emergency shutoff are pretty handy as well. They are air plunger type switches, you push the knob down and one of them will stop and restart the truck engine, the other is your fast idle control to raise or lower the engine speed.