Forgive my ignorance and foggy memory, but I remember reading once that some racers preferred 4 doors (I believe up until some type of rule change)and the claim was that the added structural components made the cars a little stiffer. Is this car evidence of that?

1968 Plymouth Fury III
2dr FT, 383-4v, 4 speed

1972 AMC Ambassador SST wagon
360-4v, automatic

2014 Challenger R/T Classic 6-speed