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Dirt track racing in 1920s is using T-Bucket style cars.
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Dirt track racing in the 1930's using more modern styles of T-Bucket styles.
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Dirt track racing in the 1940's is starting to use older trucks.
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Dirt track racing in the 1950's is starting to use more advanced truck/ car body styles.
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Dirt track racing in the 1950's is starting to use actual car bodies for dirt racing.
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Dirt track racing in the 1970's is starting to invent the late models class.
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Dirt track racing in the 1980's is now booming with late models and street stock classes.
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Dirt track racing in the 1990's is starting to introduce Sprint cars
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Dirt track racing in the early 2000s has invented the Modified class.
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Dirt track racing in 2010 to the present, has invented the wingless sprints, bmod class, amod class, outlaw late models, crate late models, street stocks, pure stocks, and hornets classes.