Absolutely true on the small stuff (as in, not requiring heavy lifting of drivetrain parts) taking up the most time. I am almost three years into my project and still not done. Granted, I am slow and very busy with other things, but still... it's almost embarrassing.

Paul - let me know if you can't find wiring information. I think I have some later Isuzu factory manuals with diesel sections I can send you. Honestly, though, if you are not trying to connect the QOS system, all you need are the fuel cutoff and alternator connections. The rest you can find in the ETM for your chassis.

Curtis - that's the way I did my pickup tube, as well. Pretty straightforward.