800 on the bottom end isn't going to be an issue. if I do this, i'm building it to do it right. Nationals are a whole different world. Even stock cars are build to take advantage of every nuance in the rule book.

I think 2500 is probably doable with some careful choices. I've got to maintain a full interior, but am allowed to ditch the back seat (and associated seat belts and such). K-members are currently prohibited, but I can do any control arm I want, so i can save some weight there.
This car should come out to be a monster. We're talking fender flares and 335?(maybe) rear tires.

Just out of curiosity, what would be required to get up around 450 rwhp? 350-450 is really the sweet spot. Anything past that becomes pretty difficult to drive consistantly in an autox type scenario.

Oh, and any idea how the lag is on a setup like that?