I’m guessing this is to slow the Mopars down

QUOTE="RustyRatRod, post: 1974463791, member: 14960"]
They never have before. The closest was when NASCAR banned the Ford SOHC 427. That wasn't a "power down". That was just a "you caint run it".
[/QUOTE]
Well, actually, nhra did too.They penalized the 351 Cleveland prostocks when Glidden and Nicholson were outrunning everyone. Gapp and Roush went to a four door Maverick to get wheelbase, to get around the weight penalties..
I don't know about Nascar, but nhra wants chevies to win, and will do what is necessary.