Not a 66 but I remember seeing a 68 R/T called Lil' Leprechaun. Wild green paint job that is hard to forget. Maybe some of the folks who race at Great Lakes drag away might chime in. I saw the car in 1989-1990 at the mopar show.

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