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Winston Cup cars of the '60s and '70s showed signs of change. Manufacturers leaned toward more aero-efficient roof designs with sloped rear windows, rear spoilers, and slicker body shapes.
Aerodynamics - Stock Car Aero Defined

Winston Cup cars of the '60s and '70s showed signs of change. Manufacturers leaned toward more aero-efficient roof designs with sloped rear windows, rear spoilers, and slicker body shapes.  View Related Article

 

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