I'm new to the nation and needing some help. I have a 97 7.3 stock single cab drw with manual tranny. In gears 1 thru 4 i have little boost/ power. 5th gear or any gear I get over 2k rpms, i have decent power but not as stong as i think it should be. I'm in constructoin and pull anywhere from 7k to 20k lbs. I have bought but not installed a K&N COI and a 3" downpipe. Thinking of Edge Evo tuner. Not looking to spend a lot of money, but need to be able to pull a load.