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Here's a very good view of the Watts link, a very radical design for a stock car, even in today's world. With this design, as the car moves vertically and rolls, the rear end stays centrally located and does not move laterally. Therefore, the rear end does not steer and always stays pointed straight ahead. This was very important at a track like Daytona. The rear roll center appears to be at a height of around 12-13 inches off the ground, fairly high for that time period. The springs and shocks are mounted behind the rear axle tubes. Also in view is the bracket for the third link placed to the far left of the differential close to the left trailing arm bracket. This left side mounting of the third link would have provided increased loading of the left rear wheel and tire upon acceleration on a smaller track. This would have been a huge advantage over conventional designs of the day especially considering the narrow and hard tires combined with high torque and horsepower engines.