Low boost can be done with no problems. Even small amounts of spray can be done to a stock engine. You just run into the problems of using it too often. An engine doesn't like to run at WOT all the time when it is connected to a 5000+ pound truck.
Your list is more impressive than I can afford, so no, I haven't done many of them.
Stuff like the intakes can be experimented with at a minimal cost and a little common sense. Take anything I say with a grain of salt because I'm no mechanic and certainly not an expert. I just type my best opinion and am willing to learn from the parts that are wrong. That is why these forums are so great. Technically I should be asking you for opinions, I'm one of the youngest members of this forum.
