Mr.Yuck if you are talking about Bill's blue demon it is a 499 with a 670 lift roller.He bought the motor out of my brothers full interior 30x10 tire 69 dart with mufflers and went 9.30's at 146.And 1967dart gt if you never see a street car with a big block run good you need to get out to different tracks more often.Not saying they are everywhere but there are some good running ones out there floating around.