Dennis; You take the plans of the Sportsman chassis and copy them to fit the Early Modified body of your choice. Yes they are going to be narrower and probably shorter to fit said body, but it is a copy.
Your Sportsman chassis is a home built chassis made by you. It is not a copy of the Bob Hanna chassis that we are using for the Sportsman class. I can see why you are questioning my remarks as "a copy of the Sportsman chassis" because yours is way off the mark, it is legal, but not what I had in mind when I made my statement.
The chassis class will copy the Bob Hanna chassis.