NASCAR Mopar

Ooh, just read an article that stated that NASCAR actually bent over for Chrysler once!
"...To keep the Winston Cup teams running Mopars in the hunt for one more season, the sanctioning body revised the rules to allow the 1974 Dodge Charger to run for four years instead of the normal three, and Richard Petty, in his ’74 Charger, finished the (1977) season with five wins and a second-place finish in points.." New for Petty '78 Dodge Magnum abortion landed him his only season without a win since '59, but shared that season with the equally bad young Monte Carlo body. Even the King couldn't win with junk.

I wonder if there was a threat of a Petty Boycott, either implied or overt.