Love the road trip, hate the money.... WEROCK East was going to cost us about 4 grand in diesel.
4000 mile round trip is going to be 1500 bucks in diesel alone. (conservative...)
More power to you.
Buy ALOT of sheet steel and plate everything under the truck, spend ALOT of money on shocks and springs. Shocks are probably going to be 500 each for 4 of them, plus 150 each in jounce shocks, plus 1000 easy in leaf springs for the rear that will have to be rebuilt every other race.
Build the hell out of your rear, it takes alot of abuse with the rear leaves. Lots of impact. I would reccomend a 9 inch with 3-5 hog heads to change the rear ratio depending on the track.
Most tracks are best run in 2wd, but some are going to do better in 4wd. I would build a front axle and a front beam so you can have the option. When it is fast enough for 2wd, you dont want to deal with slinging a 4wd axle you dont need to sling.