Sorry, but the true "King" of Mopar is the 67 Plymouth GTX Hemi. The ACR version was a stripped down ringer. I think Chrysler ought to do the same thing with the new Challenger: no carpet or insulation; no rear seat; no radio; no a/c; and no sound insulation. That car weighed over 800 lbs less than a stock GTX. I agree that the Daytona was the racing king, but for pure street/track performer, no Chrysler product can come close. I'll have to find the Road and Track article again.
They do, you can buy it from Mopar. Add your own transmission. It comes with a choice of engines and will run 10sec 1/4 mile right out of the box.
85-87 Omni GLHS. OK not a 'muscle car' but what a sleeper almost 1hp/10lb. nice ratio. easy and cheap to modify and durable. Then there's the Shelby Z daytona w/innercooler. Or how about a 1991 spirit R/T 220hp DOHC. Who'd expect grandma car to spank some the 'performance' cars of that time.