Good luck getting a wheel alignment after you lower it. Besides making the truck butt-ugly, lowering one makes it impossible to get a safe, reliable alignment job. While there's a lot of accessories out there to change ride height, up or down, none of them seem to take the suspension geometry into account. Invest in a good trailer, haul it to the car show, win your trophy, and haul it home. Don't put the rest of the driving public at risk with a dangerous vehicle with unpredictable handling! Just my humble opinion!
Jerry