Link Leaf - Don Carlton ?
Don Carlton, with factory backing and Chrysler engineers, did an incredible amount of testing in every facet of Pro Stock racing - aerodynamics, hood scoops, transmissions (clutchflite), suspensions (leaf-link) , etc. It didn't matter how "weird" it seemed. In testing the car was loaded with computers and sensors and they had a computer loaded van dedicated to processing all the info. If there was a chance it might help performance, they tried it. They also had to come up with ideas within the rules. For a while, it was mandatory to retain stock-type suspensions, which is why they had leaf springs in that photo. Rules probably changed soon after that to allow ladder bars, possibly influenced by NHRA allowing Bill Jenkins Vega into the class.
Mopar Missile history