RE: Plenum (gasket) replacement and tire questions.
I have removed the fan shroud and other miscellaneous components. The cables and wires on the manifold have been marked as well - so now, it's a matter of removing the injector connectors and going from there. I don't plan on removing the injectors from the rails nor do I plan on removing the throttle body.
Alas, everything is on hold until Tuesday. We have a garage on base that allows us to perform maintenance and repairs - and that's where the truck is parked. Unfortunately, the place is closed Sunday and Monday.
So, Tuesday I'll pick up again and go from there. Thanks for the tips, everyone! The method I'm using is small, colored zip ties and it simplified everything. I imagine reassembling the components will be much easier now that it's all coded appropriately.