I have no mechanical knowledge to share, as these guys covered everything you could want to know (and more), but I wanted to say that I love those stock hubcaps. Sounds like you got a great deal on the truck.
Excellent! This would be a nice replacement for the 'Fuel Injected' script under my Suburban badge. I'm still not sure how that got there. The truck must have led an interesting life before getting to me.
Which headlights and corner lights did you go with in the latest setup? Same with the smoked cab lights. Where'd you get them? There are so many options that it's easy to get overwhelmed when looking.