I don't know of a flow chart but you could make your own. I start with the foundation (frame) and go from there. First is to make the frame stout and worthy of the speeds and horsepower of today. Read, no twist. This requires boxing the frame and adding a K member. I like to use 1 x 2 tubing for the K member and do it top and bottom of the frame to prevent twist and will also support the floor. Next come suspension front and rear...your choice here from solid axle to independent front end and rear from leafs to 4 bar and bags. Once that's done drivetrain is next, again your choice from Iron Duke to V12. Trans to match the engine of choice...etc. Now you have a solid foundation for the body. All you lack now is finishing up!!!