What was it?

I recall seeing blurry photo's and reading this quote from a website but would be curious if anyone had further info.?

That's where I came up with the swinging traction system," he says. "We were playing with traction bars on the '62 and ended up with something on the '63 car that was 180 degrees from what everybody else had. Essentially, these bars ran from the axle housing backwards to just below the rear bumper, and we replaced the rubber spring eye bushings with solid steel for less suspension play. It definitely worked to plant the rear tires; when the throttle was nailed, the car would literally jump off the starting line. Remember, we ran 7-inch slicks in those days, and those cars needed all the weight transfer and traction they could handle. We were protested wildly over these bars, and they were ultimately outlawed for 1964."