All of those events came in the 1966 season, when Lamphear entered his Fords in the events. In his debut at Bristol Motor Speedway in the spring, he didn't even complete five laps before falling out with oil pressure problems. That left him 31st. Then came more DNFs at Martinsville and Darlington Speedway. In fact, by the end of the year, Lamphear did not finish any of the twelve events he raced. Despite that, Lamphear earned his best career start (7th) and best career finish (9th-only top ten) at Spartanburg. He did not complete the last forty-four laps of that event. After not being able to improve later in the season, Lamphear disappeared after a 30th place effort at Fonda late in the season and did not return to racing.