I'd say not even a budget beyond the typical pump parts (AFC springs, gov springs, plates, DV's). Start throwing turbos and injectors at it, its no longer a tuning challenge, but a shopping challenge. If a mag is doing the challenge, have them lay out the assortment of parts that are allowed to be used. Have stock, 3k, 4k, 5k GSK's, springs for the AFC (including gov springs if desired), all the plates of the rainbow, plus a stock plate and a grinder, and a couple options of DV's. Give them the same truck (1 truck) to have them work their magic on the pump, dyno it, do some street tests, bring it back, yank their parts out and let the next guy do it. Get a 5 speed truck or a built auto already so that is taken care of. I'd say do a manual just for the ability to do a idle to redline dyno run without having to worry about downshifting and lock up issues.
Tyler's idea of a mild and wild test would be interesting, especially if the wild truck has twins or triples or something else out of the ordinary, then that can be tuned in as well. No swapping of major components though. Tune what you have.