And what many didn't realize was that when they check for full throttle, they would hold the throttle wide open at the carb, then push down on the secondary air valve flaps, and yep, it's opening all the way. They never realized that they have to hang over the fender and look down the throat of the carb to see if those baseplate blades are opening all the way.

By the way, in reference to "Musclecar vs. Ponycar" from Bjorn, it was the Ponycars that ended up being the quickest, fastest, and best handling cars of the Musclecar Era.