And half the rwhp of my supercharged viper which still can't beat a stock hyabusa, sorry 422rwhp in your mustang, isn't going to beat a stock base model corvette, and yes I've had my fair share of mustangs, you'll run high 12's at the track if you are a good driver
If 420whp only nets high 12's, either A. You can't drive or B. You need to spend money a set of tires.
My SRT-4 Neon went 11.5x every pass at the track and that car was lucky to make 415whp. This was on 24.5in slicks