Not that I know of. From what I remember, the car is a constant state of development. Keith is not the type to go show everyone what he's doing, he just takes in on the track and shows by winning. He owns his own shop (Powertech), so just works on it nights/weekends and really knows what he's doing.
That car is the ultimate example of a go-kart with a lot of hp. No windshield, lots of tube framing, very stiff, very light, etc. He even runs very small stock 914 brakes because they are lighter (and he obviously doesn't use them much). IIRC, 15" wheels for faster acceleration, re-geared transmission, etc. I only know this stuff because I used to live in NJ and knew Keith and the shop - and the car.
Here's a link to them with some pics of the car under Keith's name.
http://www.pwr-tech.com/ourstory.html