I've been searching the internet for people that experienced similar symptoms to what I am seeing and have found a couple that appear to never have been solved. Essentially the truck starts fine and it runs really will up until around 2,500 rpms. The truck only has 130K miles on it and the oil has been changed ahead of schedule most of the time. If I rev the engine up in neutral it will start misfiring about right at 2,500 rpm on what seems like a single cylinder. It will continue to rev up with more throttle but the misfire is persistent from 2,500 on up to redline. The smoke at misfire is whitish blue. This truck has been parked for extended periods of time. Before I acquired it they probably used it a could to maybe 4 times a year. If anyone has any guesses your input would be greatly appreciated.