That's a great concept, starting out with a less powerful true muscle car and easing into the more powerful true muscle car not that the Shelby GT is not powerful at 325hp and 330lbs ft of torque in a 3500lbs car.
For those who jump right into an SRT8 with limited slip (or the R/T with limited slip), take it easy and be patient.
Some advice is to do what I did when I learned slowly how to master the slides on the street. Believe me, it's one thing on the track or parking lot but in the real world, the best advice is to try seeing what the car does in the rain to realize the limits of the car and then slowly attempt dry slides even though both are not totally the same with different strengths. One thing to point out is that when you slide in the rain, the unpredictability concept is of a different character. The concept is to be "in control" when you are seemingly "not in control" when the car is in a slide. At that point you have to be one with the car. You become the car. The only physical thing in between your brain and the wheels is the steering wheel and gas pedal (and sometimes the brake pedal where in some instances if your rear end is to fly out to the point of no return you can sometimes hit the brake pedal and stop the otherwise forever turning slide). You might be amazed at that point that your brain is operating faster than the ABS where you can lock the rear wheels to your advantage to break a slide or in somecases cause one if you are slotting yourself in between two other cars (please let those cars be your friends' cars). My Bosch 5 ABS in my 94 Impala SS can be defeated that way although I am not familiar with the ABS in the Dodge.
I took advantage, when I was still mastering fishtailing, of the city works streetflushers which would flush down the corners of my local main streets in the summer time. I don't remember why they do that but it's perfect for tapping the gas pedal and "woohoo", out the rear goes. The wet corners were like training wheels when learning to ride a bicycle. If you oversteered too much and where otherwise the car may go into a 180 degree spin (and end up facing traffic coming in front of you which is very embarassing , you'd know you screwed up but the dry road ahead of the corner would make your wet hydroplaning wheels grab; cool. That is another thing, the word hydroplane is an interesting one in that when you slide in the rain, theoretically there is no contact between the ground and the rear wheels meaning half the car is now floating on a thin sheet of aqua (water) and it is up to you to bring the car back to the ground. In short, this is better for your tires than tearing up that poor Z rated compount which has a regular life expectancy 25,000 miles only. Remember that a worn out Z rated tire isn't very Z rated anymore and will not hold up at 130mph (dry only rating!).
Another thing I enjoy personally is going into a slide on a corner and leaving my Impala's auto shifter in 2nd gear. As I usually downshift into second as I turn into the corner, the car is now in a more optimal RPM range where you can take advantage of the torque peak curve. In my car, especially, it's especially nice to leave it in 2nd during the fishtail (usually one nice swing out one way and another the other way and back to straight city) as my car stays in 2nd and doesn't hunt for 1st or 3rd via the automatic's torque converter. This ensures a steady stream of torque to play with. REMEMBER, IT'S THE TORQUE CURVE THAT GIVES YOU THE OVERSTEER AND/OR FISHTAIL ACTIVITY NOT THE HORSEPOWER.
Another nice thing about the GM cars anyway is that the steering wheel always likes to seek for the center. When you are in a fishtail mid-drift, the car tries to find the center but overshoots (depending on how fast you are going and, ofcourse, at what speed you engaged the corner/fishtail from the onset). I've often (in recirculating ball steering systems anyway) let the car slide on it's own while not even holding the steering wheel and applying on and off the gas pedal. The recirculating-ball type steering system on the GM Impalas and my old Malibu (and as someone pointed out here, the Dodges use rack and pinion which compared to the GM Camaro/Firebird) was trying to seek for centre while the back end was out one way, the steering overshot center as the backend slid the other way. Eventually, the steering overshoots minimized as did the multi-directional slides (fishtails) and when the car found center, the car was no longer fishtailing and was on a straightaway course once again. I don't recomend this ever but for the purpose of our conversation, it helps gain a physics comprehension of how the oversteer situation works. Another thing is that this example works better for the high ratio old school GM recirculating ball systems as opposed to the performance oriented low ratio high effort power steering boxes. In particular the car I was using during this was a 1978 Chevrolet Malibu with the high ratio (more turns on the steering wheel than less) low effort Saginaw 604 power steering box. This was not considered a performance item such as the much better Saginaw 800 of the time period which could be had in Caprice police cars, Chevrolet Monte Carlo SS cars and Buick Grand Nationals. The high effort low ratio performance boxes are better as there is less spins on the wheel (geesh this reminds me of that 1989 song called Spin That Wheel by Technotronic/Hi Tek 3
YouTube - Hi Tek 3 - Spin That Wheel (original 1989 video) ). Just download this song as you learn how to control the Challenger, there's motivation in the right direction.
Another thing for all you open axle non-limited slip folk out there. If you have a healthy shift kit in your car's transmission ensuring positive shifts (as in 1-2 chirp and sometimes 2-3 chirp IN THE DRY; in the wet these will become rear end slides if you are chirping into a gear while driving on an angle WITH limited slip and that's where alot of cars get WRAPED around poles a.k.a. lamp standards) you can fool the rear end into a locking situation (as opposed to non locking open axle) if you strategically down shift into 2nd and tap the throttle in the dry. The rear will slide out like a limited slip would on train tracks! At least this is the experience I've had on a live axle (not independant rear suspension) 1978 Chevrolet Malibu with a 2.29:1 open 7.5" axle. In my case I had to downshift into 1st as I had ridiculously tall gears which most of you hopefully will never have to experience (essentially I could do 60mph in reverse or in 1st). This trick was told to me by a very good friend who was and still is a rallye driver. I'll never forget the day I tried it on a hot summer day on West 16th and Blanca Street in Vancouver Canada. Somethings you never forget.
if you ever lose it and do a 180 degree spin on a city corner, keep the steering wheel turned toward the direction where the car is oversteering as it will hopefuly ensure you slide into a 270 degree turn whereby your car will face oncoming traffic as opposed to doing a faceplant into a lamp standard or innocent bystandards or at the very least smacking up the curb and requiring at the very least a wheel alignment (that's another thing, always get wheel alignments at least once a year or when you change your front tires) or screwing up upper and/or lower control arms.
Be safe,
Control the car or it will control you.
Good luck guys and gals.