Silver crown and Sprint Cars are built with the assumption there is a good possability they will get upside down, both in construction and the cockpit equipment When drivers get in the car they do it with the same attitude.
Late Models and Mods are built with the attitude that race cars don't get upside down and saftey equipment are an uneeded hinderance. They revolt against containment seats, window nets, arm restraints, fireproof footwear and gloves. Head/cage clearance is non exsistant. The cars are basically built like tooothpics as each chassis builder tries to build the lightest car.

A tacky half is pushing the saftey limits for them, A mile track in one of them is plain and simply playing russian roulette.