I just got around to reading the August 2022 issue of Mopar Action magazine. (Yea, I'm a bit slow!) In one of the articles, written by Richard Ehrenberg, it is mentioned that the Mopar A body was the only car ever certified to run on the NASCAR superspeedways without a roll cage. (that statement is on page 66) After doing some internet research, it appears the NASCAR compact race series was a 1960 and 1961 only deal.

The early 60's A bodies looked considerably different than the later A bodies. Visual differences aside, were all of the A bodies the same structurally? How did the strength of the later A bodies compare to the 1960 and 61 models?