You will love the tune and the exhaust. That is almost exactly what I did to my 02 F250. Dp Tuner 5 position switch too. (Still have it in my tool box). Mine was 40, 60, 80, 80 economy and 125. Never used anything except 80 econ when towing and 125 the rest of the time. A-pillar gauges, 4 in MBRP exhaust, cold air box, upgraded HPOP, turbo pedestal upgrade and high pressure oil line crossover.
It turned the truck into a towing beast. It made about the same HP and torque as my current truck (400/800), but weighed 1400 lbs less. I loved that truck until it got electrical gremlins at 192,000.
Two other things you should replace or keep a spare in the glove box. First, turbo intercooler boots.
THESE are the ones I put on. They are made to take the extra boost the chip will make. The originals have to have been replaced, but the extra boost from the chip will strain what ever is on there. I blew mine off coming home from work one night. The 7.3 doesn't want to run without them. Oddly, I blew a similar pipe on my 2011 last month on the way to Disney.
Second, pick up a CPS (
cam position sensor), or 3. The 7.3s are notorious for them failing. They are cheap. Like $19 in the link I gave. Also throw a 10mm wrench in with it. It is on the lower front of the engine and it takes 2 minutes to replace if you have the wrench. I changed 3 of them on the side of the road in the 6 years I had my truck.The CPS does nothing other than tell the computer the engine is turning so keep putting in fuel. When it fails (like driving down the highway... twice) the truck just shuts off. It will crank, but not start.
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