Brad,
I didn't see the quotation marks but I quickly realized that information was not from you after reading that Big Truck Story.
"For '47-'53 AD trucks, though, the medium trucks got the bigger 235 developed during the war."
"medium duty" trucks (to be accurate) in the 1 1/2 to 2-ton range
to be accurate, 3600-3900 were medium duty in Chevrolet terminology.
1.5 and 2-ton trucks were called heavy duty.
"'47-'53 . . . medium trucks got the bigger 235"?
3800 and larger, maybe (not 3600, which was called medium duty).
235 "developed during the war"?
1941? Not unless the story is referring to the war in Europe and GM anticipating Pearl Harbor at the end of that year?
"The good news for an owner of the average medium-duty AD truck, however, is that his original engine probably died an ugly death during the Eisenhower administration and was replaced by a full-pressure oiled 235 (The one in my truck is from a '57 Corvette, believe it or not)"
I worked on many old farm trucks in the late 60s (well after Eisenhower) that still had working and easily/cheaply rebuildable 216 engines in them.
The 57 Corvette statement caused me to stop reading, believe it or not.