I agree Ken, AX9 with your car on streets against Dave and company may be a challenge...but you have a well set up car and an excellent driver at the wheel, so it might be better than you think.
But as you say Dave's car has been dialed in over the last ~20 years now, and he runs DOT Rs, he is a very formidable opponent.
Find out what the new "best" trick street tire is and give it a go.