"we're lookin' to do Nelson with a minimum of work / tire changes" say what?
You are going to have to change tires.
You are going to have to work on your car when, not if, the piece of crap breaks.
You are going to have to work on your car when one of your foolish driver hits something.
You are going to have to work on your car when another foolish driver (hell that's all of us out there) runs into you.
How else do you plan to do that heroic fix that gets you out of the pits and back on the road to glory? Are you going to just talk to your car and tell it to fix itself?
Get ready to work you ass off (and have more fun than should be legal).
In upteen years of doing the Longest Day at Nelson's I can remember a Fiat X19 doing the race on just 5 tires. EVERY other car uses 8-10 or more tires in 24 hours. Big cars eat left front tires. Bring plenty.
Spud
Remember, it's never too early to start embellishing the past.
"so there I was, 90mph, sideways on the brink of death ..."