Any Valve Cover Racers

Working on a Fire Dome Hemi racer. Conveyor belt wheels, skate board wheels, machined billet wheels, lexan wheels. Imagination, check rules where ever you race. Wheels must not exceed the flange of the cover in most cases. Taller ones rub the rail and slow them down. If you notice my taller ones I have machined fenders to allow no rail rub... Some have four wheels, others only three. We also race oil pans.