David,
I spec'd Hoosier DOT slicks. This will even up the tire issue.
The 15's are much more forgiving to camber change than the 17's. So it should be quite equal.
As far as driver, I recommended John Morton. He has a bunch of experience as well. (Kazillion Willow laps) And he is certainly a bit crusty.
As long as the driver is qualified and does not have any factory alliance, it could be anyone.
Time and place. I recommended Willow at the October COCOA event. On the Friday test day.
I have not read anything about a charity. I am not sure how you would raise money for one with this event.
I think that it would be cool if you brought one of each flavor. (The 351 car would need a Ford crate engine.)