I know it's not a mopar but my Sunbeam Tiger has always scared me no matter how long it's been in the family. Try Dana 44 with 13" wheels and now 400 hp 289 with close ratio top loader. All of the performance parts on the car are vintage LAT ( losangeles tigers ) options.
Surprise, surprise; but it may well be a Mopar. The Sunbeam Tiger was in the Rootes Group catalog when it was acquired by Chrysler. The first problem Chrysler had with the Tiger was the idea of providing warranty support for a Ford built engine. Due to this issue and the sales numbers, Chrysler killed the Tiger and gave Plymouth the Cricket a few years later.
A 289 Ford could be set up to make nearly 450 hp on pump gas. The problem for Tigers in SCCA racing was hanging onto the tires til the end of the race. On a short course and a short time/distance, they were tough to beat. The problem for them was they where matched against Shelby 350s, SB Corvettes, and SB Cobras in the B Production class. These pairings almost always made for a great race.
The scariest factory ride I've ever driven was a '68 SS 396 375 hp. 4-speed Chevelle. What made it scary was it had manual steering, drum brakes, and the streets were wet when I drove it. What scared me the most was when I released the wheel to come out of a skid, the wheel spun around so fast, it buzzed like a fan. If I had tried to grab the wheel inside the spokes, I'd have lost a few fingers. There was plenty of motor to drive it sideways with the throttle. Yee ha!!!
The scariest non-factory ride was a 53 Studebaker coupe, a lot like the one in the photo below. It doesn't look very scary, yet. Visualize it in fly yellow with a 365/327 and a 3-speed overdrive. For those who are interested in such things, a 53 Studebaker coupe had a curb weight of 3040 lbs. That gives this ride 8.33 lbs/hp, compare to a 440 A-body at 9.06. Top end was clocked at 155 mph. Manual steering and manual drums. Studebaker steering of the day had a link connecting the steering box with a knuckle in the center of the front cross-member that connected to the tie rods. It was stable at speed but really spooky under braking. I'd love to build one of these with a S/C Gen III Hemi, 6-speed transmission, disk brakes, and a R&P steering set-up.