1973 Pontiac Sd 455 Trans Am Carburetor
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The vacuum routing and solenoid placement of the first- and second-type ’73 emissions systems are noticeably different. This vintage photo from the original Hot Rod article clearly shows the Trans Am’s SD-455 is equipped with a first-type system, indicating it was produced before March 15, 1973. The vehicle’s build date is mid-December 1972, which coincides with that. View Related Article
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