Altered class breakdowns in 60s and 70s

Old 01-09-2015, 03:45 PM
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gorilla1
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Default Altered class breakdowns in 60s and 70s

Recently bought a vintage, updated altered and would like to letter it with the proper letter designation from way back then. I know it was cubic inch to weight but don't know what those breakdowns were. Any help would be appreciated. Thanks, Mike
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