I had a white 1968 Plymouth Roadrunner. Stock...383 CI and 335 HP. After a few tricks it was putting out 413 HP to the rear wheels. I sold the bird in 1970 and purchased a 1969 Hemi Cuda. Stock....426 CI and 425 HP. I used to sometimes scare myself when I jumped on the Cuda. Gas went to $.50 a gallon in 1972 and I sold it. How I wish I owned it today.