We just ran a 98' 3500 dualie long bed extra cab 12v over the weekend it did 455 HP 1021 TQ uncorrected at 5700' elevation on our Mustang MD-1750.
180 HP factory pump, stock DV's, 24* timing, AFC LIVE stage 1, Budget Builder 5x014" VCO 145* injectors, Austin Tate built 62mm HX35, wastegated to 42-45 psi max.
We had to cut the fuel back to around 80 to 85% for the best numbers using the AFC LIVE. It made more power the higher we wastegated it, but didn't want to blow up the customer's new turbo.
What's best, is the "older" gentleman reported his previous best MPG of all time was 18.6 MPG since buying the truck brand new in 1997 even with the DDP 2 injectors and advanced timing, after tuning and the new injectors, he reported 19.6 MPG on his drive back to Arizona. All we can figure is getting the 145* spray pattern down in the bowl vs. 155* on the edge of the bowl picked up his mileage.