Taking my son's Eagle Scout project up to school. He built cubbies for the wrestling room so they have a quick place to store their stuff off of the floor during practice. Locker rooms aren't convenient for the wrestlers.
Brake rotors don't warp. If you got them hot enough to warp, your truck would be burnt to the ground. You are experiencing DTV (Disc Thickness Variation). It is mainly caused by pad material depositing on the rotors. When pads are new or when really hot, sitting at a stoplight with your foot...
I'm likely getting the Powerbass for Fords. Plug and play. They aren't super high end, but are way better than factory and bolt/plug right in. Get the speaker rings for them and put some Fatmat or other treatment on the inside of the door, especially behind the speaker. It will make a world...
One last thing while I'm on my soap box. This is all just step one of the NVH process. An EVA meter (Electronic Vibration Analyzer), whether factory or an aftermarket one then has to be set up and used correctly to see what frequency the NVH is. That will lead you to which components to then...
Kind of lurking, but here is my $.02. This sounds very similar to the NVH problems on the newer 5.0 Mustangs. Dealers are chasing their tails. Some of the people have gotten one of the NVH meters for iphones. They aren't cheap, but many have had good luck. They narrow it down to a Hz...
Something to keep in mind. An OE shock that says Rancho is built to that OE manufacturer's specs. They are not the same as an aftermarket Rancho shock.