Nice picture! Dang that car looks good with Halbrands! Hey Fran, got any 15" sets of those running around?
I just got done reading Donahue's book too, but he's not that long on real specific details. I think he, or his co-author, didn't think people would be all that interested. Anyhow, gory details about the car, engine, etc. are not that forthcoming in there so I can't tell you which version of the car, etc. that is. I'm sure somone knows though.
As for the roll bar, I don't think he is sitting at normal driving height. The couple of picture I've seen of him driving all you can see is eyes and top of helmet from the front of the car.