Spencer drove for his own independent team for most of his career, and was one of the most successful independents of the day. His best season came in 1965, when he finished fourth in points with 14 top-5 finishes and 25 top-10s and his only career pole. Although he drove GM and Chrysler cars for most of his career, he drove Fords in 1965, where he found most of his success.
