I have been noticing people on here worrying about milage under a 100k. My truck is an early 99 and has 270ish on it. Should I not be trying to get some extra power out of it? Everything seems to be working real good on it so far. I already did the tymar style intake, got a 80hp ebay chip it the mail(all I can afford right now), and on the 15th it is getting a pieced together 4" straight pipe to the back. I'm I approaching this all wrong? I've been under the impression these are real strong engines. Also Its a dually with a manual tranny. If that means anything.