Hot engine compartment

I do hear a small pop-assuming its the thermostat and the coolant is nice and green. I checked under the hood after it sat for over 3 hrs and the black plastics were still hot. Cranked it up and the air coming through wasn't quite as hot- air temp dropped about 10 degrees and the sun hadnt been directly overhead as it had been for 5 hr up until I got in it this afternoon. I checked other parts of the trucks body and they were pretty hot too even being white. Heat index has been 110+ for the last week or so, prolly just the heat. I'll still mention it when I bring it in for an alignment this weekend see what they sa, maybe they can test the thermostat just to be sure. I want to get anything I can find addressed before the dealer warrantee goes out in 1K. I have been trying to get a complete mods list from the previous owner, but they say they can't get ahold of him and they wont gimme his number. I made them sign my extended warantee guarenteeing it covers the truck as I bought it, but still alittle nervous. Already been told it doesnt have the camber locks they need to properly align it but they are going to put some on for me since I made it clear I was pissed that the aligment obviously wasnt done before I bought it. I am glad I got a great deal on it b/c they are pissing me off about the mods list!! I hate not knowing everyhting that was done to it!! I've done a lot of research and have identified what I have listed in signature, but not sure about spacers for the wheels or upgrades to certain parts of the steering systems because of the lift. I'm going to take it to an off-road shop and see if they will get up under there with me and go over some stuff. I worry about the driveshaft angle as it has changed b/c of the lift, looks like part of a support beam was cut for the driveshaft. Is that normal practice?