He finished 5th in 1981 and repeated the result in 1982 in Los Angeles after a controversial Heat 14 exclusion following a coming together with defending champion (and eventual 1982 winner) Bruce Penhall in which Carter fell and was excluded for being the reason the race had to be stopped (Carter slid through the fence).
He finished runner-up that day, despite being the only rider to beat the eventual champion Bruce Penhall.
Crump rode in the controversial Heat 14 which saw the clash between defending champion Bruce Penhall of the United States, and Englishman Kenny Carter.
After Bruce Penhall won twice in 1981 and 1982 - the latter being the first and only time a World Championship race has been hosted in the United States, in Los Angeles - it was time for Denmark to ascend the world control of speedway.
Bruce Penhall rode a Weslake speedway motorcycle to many successes in the early 1980s, including two World Individual Speedway Championships.
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One of the stars of CHiPs was World Champion Bruce Penhall who portrayed cadet–probationary officer Bruce Nelson.