Some people think this is the car that forced NHRA to come up with a formula for Pro Stock. Wayne Gapp and Jack Roush built this four-door Maverick with a small block Ford under the hood. (DRO file photo)

Jack Roush and Wayne Gapp actually had a fairly long career in Pro Stock. Here is a shot of their two-door Pinto with Ken Dondero between the pipes. (DRO file photo)

Remember the old SS/X class? Here is a shot of legendary Ford racer "Dyno" Don Nicholson in his Cougar Eliminator. (DRO file photo)

Thought Butch Leal was a Mopar guy? Wrong again. Here is a shot of the "California Flash" driving an SS/X Mustang for another Ford convert Mickey Thompson in the middle sixties. (DRO file photo)