Trans Am

  • 1973 Trans Am 455 Super Duty

    1973 Trans Am 455 Super Duty

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    by

    Colin

    While we can all agree the original muscle car era was D.O.A by the 1973 model year we certainly all agree there was one huge exception- the Super Duty 455–powered Pontiac Firebird Formulas and Trans Ams. The Super Duty (SD-455) was a street legal race prepped engine. All were hand assembled, with a reinforced block…