The part about the 2014 rulebook being changed to allow pre-48 trucks to have a 3" beauty chop, and the fact that there is a team building a '47 Crosley truck with what looks like an approximate 3" chopped top may be pure coincidence, but it made me go "hmmmmm".
Their Crosley truck looks like it should be extremely competitive with any production truck body in terms of aerodynamics. I'm sorry I didn't think of that design earlier. After a short internet search, I don't think there are any stock-bodied trucks which would have a smaller frontal area than that Crosley, even before it was chopped.
The rulebook previously required bodies to be completely stock. I have to assume that someone lobbied to allow pre-48 (why 1948 as a demarcation date?) to be allowed to utilize chopped tops.
Whatever the background behind the 2014 rule change(s) to DT class, that Crosley truck is just plain cool.
Steve.