The best muscle cars are the Pro Tourers, which if I understand correctly, applies to any muscle car built to handle. There's nothing cooler than a bad-arse muscle car keeping up with modern cars on track.
You have an outdated term for todays starndars. Class history: Pro touring originated in the mid 90s and was the concept of making a muscle car or hot rod accelerate, brake and handle like a new car, plus giving it a lot of creature comforts like modern aircon, electrogizmos and all that stuff. In the 90s and well into the first 5 years of the 00s it was all the rage and some pretty functional muscle cars were the result, but... well, think of the term pro-touring as getting a muscle car to be like a BMW M5, ussualy with more horsepower. this takes me to the handling department. Yes, they handle very well, bu not hardcore well. Lets say you could call pro touring what
Chip Foose or
Troy Trepanier do, very fine street cars but nothing really brutal as driver cars.
Of course, soon a faction of the movement emerged and started building all-out handling muscle cars and hot rods complete with much modified chassis, one off suspension parts and 335 tires in the rear. Many believe the inspiration for this to happen was this single car, the famous
Big Red Camaro, which blasted 210 mph trough Nevada's desert at the open road race in the late 90s. True, the car is nothing but a Camaro shell on a stock-car-style tube chassis, but it is relevant and historic because of the hordes of imitators it generated, among which were many Mark Stielow-built Camaros, including the
Red Witch, which redefined what a hardcore street car was in the mid 90s, and
The Mule (two pictures, one in "the", other in "mule"), which also redefined a hadcore muscle car in the begining of the 00s. The aftermarket evolved and followed suit, and today there are really, really fast muscle cars on and off the streets. The "genre" is often called "G-Machines" and the biggest representatives of such these days are, I believe, are yet another
Stielow-built Camaro with all- ZR1 drivetrain, suspension and
brakes , and the
Supercuda, which recently took on an Enzo and... well, lets just say it has 600 more hp than one.
So yeah, you may say that Pro Touring originated the hardcore muscle car and hot rod, but in reality today the term is often reserved for nice street cruisers. Handling muscle cars are another world entirely now.