I’m guessing this is to slow the Mopars down

Well I guess I read that one wrong, but even in Factory Stock Dodge hasn't won a race since the second season. Have they? So why would they bother to take more power away from them? Did the Dodges find more power and are now a threat to the Chevys, I do not know because I haven't followed that class since Dodge got sanctioned out of competition a few years ago.