Who's idea for the 68' Hemi Dart

I don't know who's idea it was, but imagine being Dick Landy or even an average joe at the time when you could buy one new at the dealer. I met Dick Landy once and he was older, I said something like" man it must have been great running a Hemi in that Dart" he said, "yeah I had a lot of fun in that car" something about the way he said it meant that only he and other people who have driven one really knew what he was talking about. I think when you bought one of the super stock A bodies, there was a placard that said, "this vehicle not meant for highway use".
They ended up being registered and driven on the street I heard. The good old days when a man could get away with driving a true race car on the street. LOL!!