225 to 400

A guy I knew back in Shelbyville, IL...Jerry Clauson, had a 71 Dart and put a 400 in it. He swore by the low deck motors as they were 5/8 shorter and fit better in the car and would go the 451 route.
The first time he took it to the track at Coles County in Charleston IL, he launched the car into the center gaurd rail!!
Not sure if the guy is still around or even alive. He was one of the Mopar guru's in the area.