Modified was based on number of changes from original on your car. The usual wheels, color, engine, engine parts, etc...
That had a team of what appeared to be five very knowledgeable judges including a woman. They went over each car top to bottom. Each one seem to look at a particular area and then they met and talked. They go as a group and look a car, point and talk. Each car had a scoring sheet.
Awards were first, second, third in a class. You were classed on entry to the show. My class 1966-1969 had both a stock and modified class.
