Just remember also that the Prepared rules changed for next year too. You are now allowed to run yout IT car at Nationals in DP back to 1985 model years. I fully intend to get my ITB car out and run two classes at Nationals now....GTL and DP.
I know it is not competitive in DP but I know a ITA car won the division in 07. Can't hurt to try.....and I'm already at the track with the other car.