im not going to defend the guy but with superchips propane and enough nitrious you can make a 1000hp truck..........ONCE...........then BOOM.:bomb: done truck.
im not saying he has all the answers but he does have some good points.

if you got the truck 4 years ago i'd flush the coolant if you havent since you owned it. just a quick bit on coolant. i believe the reccommended time is 5 years. when it goes bad the ph goes up (cant exactly remember if its up or down) and it causes rust in the passages it travels through. Rust is never good so change it. you obviously care about your truck even though its not your daily driver so drain the cooling system. run straight water through the radiator until it comes out clean. then fill it up 50/50

Ok I'll try that. I haven't done that one yet. I was told that I really didn't need to do that until it started to look bad, but it sounds like I should. Is that something I can do in my driveway????? Are there any video about this out there?