Negative ghost rider, go to any order form, Kelly Blue Book, whatever, you can't get 4.10 gears in SRW. I ordered my 04 and wanted this option, could not get it.
Warranty isn't in jeopardy due to mods? You must have a cool dealer. You said you read over at www.thedieselstop.com, then you must read about the guys that get crap for mods on their trucks, not worth it to me.
If you really think that mother Ford can't tell you used a programmer, you are just fooling yourself. All computers write codes when they are upgraded/changed, Ford can tell.
Do you have your EGT probe mounted pre turbo?