I have one and I don't like it because it keeps you in 2nd gear until 80 mph when you get on it whether you want it or not even when you let ff the gas.

56 Plaza 63 D100 step side 67 Coronet, 68 Roadrunner, 69 Super Bees, 69 Coronet 500 convertible, 70 Roadrunner Post, 79 D150 360, and a severe case of Mopar a,d,d