13. 1967 Plymouth Belvedere/Dodge Coronet RO/WO Series
After the crazy 1965 altered wheelbase cars, Chrysler returned to more stock-looking models for 1967. So, they produced a limited run of RO/WO Plymouths and Dodges for 1967. Some say that Chrysler built 100 cars to satisfy the NHRA rules for Super Stock class, but the number seems high. The number of 50 cars is more likely, but some even claim they produced as little as 32 cars.
The RO/WO cars were mechanically identical to Dodge or Plymouth body style. The front end was lightweight. They equipped the cars with limited slip differentials, heavy-duty suspensions and stripped-down interiors. They delivered all the cars only in white, so the racing teams could put their own decals and numbers.
Automatic cars came through with a special Torque Flite transmission that drivers had to shift manually through its reverse shift pattern. In some cases, this proved to be faster than regular four-speed manual. The heart of the car was the Race Hemi. With 426 cubic inches and over 600 HP in race trim, it was still one of the craziest power plants on the scene.