Dave,
It has been a few years, but I did the Super Chevy shows for about 5 or 6 years. Good competitive cars and what seemed like competent judging (early on). In my last year or so, they cut back on number of judges to where one judge might be responsible for maybe 3 classes, each of which might have 40 to 50 cars. In the early years, they spent an adequate amount of time to evaluate each car...later they might spend 2 minutes on a car.
If you are going, you need to be aware of their rules as your car is placed in one of three catagories: Stock, Street or Modified. Here is the link to their rules page.
Car Show Information/Rules
If you have additional questions, drop me a PM. and I can go into more detail if needed.
Rich