Exactly Stan!
It took some correspondence with Mike Stewart for me to figure out the same thing.
My understanding of the rules in the "modified" category is this, The more modifications that are done to a car, the more the class changes. For example, a gas coupe would be a car with a non stock engine swap. An altered is the same car with the engine setback farther than stock and the grill and headlights removed. And a competition coupe is is all of the above with the front of the car stretched out to next week.
