Bill:
Not sure where that pic of the staging lanes was taken, but that 51 Stude looks suspiciously like Ted Harbit's 51 that I raced against at Milan Dragway in 1967. he still rows the gears in the Plain Brown wrapper and the red Tomato 63 Lark's at Pure Stock.
Here's why we needed straight axles under these "concoctions". This is my 61 Valiant with a 383 driver train that ran B/MP in the 60's. It had stock suspensin with the torsion bars wound all the way up to level off the car with the rear end. I put it on the street (even had snow tires on it) and it had a nasty habit of changing lanes whever it pleased. next step was a solid axle, but sold it when I got married. As Al Bundy said, "End of Life".