if you want more power you can get custom tunes reburned .
I would contact di, tonywildman, dp chips and ts and see what they can do for you . if you tell them what you have for mods they can write more customised tunes....but be sure you have guages.
Early 99 f350 4x4 crew cab, auto. pmt2 pcm
2001 cup holder ,T500, MAX AC ASSIST AC mod, Diy Twin tymar, TS chip, Powerslots & Hawk pads, ford AIC, ..... with big fat want to list.
2002 F-250 PSD
Gambling with 250/200's on PMR's.
478hp/851tq on Haller's dyno - 7/28/12
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Whats the info on your truck??? Year currents mods etc?
2003 F-250 4x4 7.3 liter PSD EXT. cab SB. Wilson 2000 antenna, Uniden PC78 peaked and tuned with a connex 250 Linear Amp.
MODS: BTS Tranny, DIY Tymar, Hypermax 3.5 DP to 5" back, TW tunes, DI's GT38R BB turbo, autometer boost, pyro, trans, water temp a Scangauge and Firestone rear air bags.