Re: Thinking about doing upgrades
You can get a 5" turbo back for around 350. I run a TS 6 position, changes the shift pattern a bit but a TransGo Tugger shift kit is a great complement, and only in the low $100s. aFe intake, or an S&B with a GTP38R, combined with the above will make a world of difference altogether under $3,000 if you shop around. If you go with tires bigger than 35s I highly suggest replacing differential gears to maintain factory RPM & speed, I run 37s and with stock gears going up a grade with my light 4500# camper feels like the life gets sucked out of the truck. Diff gearing can make a world of difference with the bigger rubber.
I work with people entrusted to maintain and repair $110 million airplanes, but can't change a car battery.
2001 F250, Floyd's Stage 3 trans, GTP38R, aFe Stage 2 intake, TS Performance 6 position, 5" Diamond Eye straight turbo-back, 6" Pro Comp lift, 36" Nitto Terra Grapplers