Yeah Jim,
That's the Cheesehead Spl, based out of Pewaukee, Wisc. Their shop was on Parmesan Ave S. It was operated by a grate racing team that was a cut above the other teams. One unfortunate situation was that nobody wanted to be near them in the pits. The advantage was it was easier for them to keep their secrets. One thing that faked out competitors was a thin coating of mold on the body. It drove competitors batty trying to duplicate it. To lighten the car they drilled holes in the frame. They were ticked off when a few years later Pontiac stole their nick name of the "Swiss cheese car". They actually had 8 cars, this being but one from the whole wheel.