A few years ago some (Chevy) guys I know were trying to get a heads up class for street/strip cars. I stopped by one of the guys shop and several others were there discussing probable rules. One of the rules was going to be no “shaft mounted rockers”. I sat and listened a bit, then mentioned that the rocker rule would eliminate all the Mopars because they came from the factory with shaft mounted rockers. The reply I got was “oh well, it sucks to be a Mopar guy”. The class never got off the ground because the rules eliminated in one way or another pretty everyone but that little clique.