The unique Pride of Pay'N Pak was Dave Heerensberger's first unlimited experiment. The boat was designed for straightline speed and would attempt to take the world straightaway record, held by Roy Duby and the MIss U.S. from 1962. The Pak was unsuccessful in its attempt, as it only could achieve 162 mph at Guntersville, AL, about 40 mph short of the record. The boat was modified to run on a closed course, but never could plane as well as a conventional hull. Its fastest heat was 94 mph in Seattle on a three mile course. It was retired following the 1969 season.
Tommy "Tucker" Fults piloted the boat in the five races that it competed in. The boat had a best finish of third in the Atomic Cup in the Tri-Cities, but could only manage eighth in national high points.