For years Pontiac hobbyists and in particular, Grand Am enthusiasts have wondered just how rare the 4-speed manual transmission was in 1973 and 1974. We recently discovered those production numbers! Click here to read more!
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Found! The Only 1973 Super Duty 455 Grand Am Produced!
SD-455, Pontiac, vintage photos28 CommentsPontiac production records for the 1973 model year reveal that one A-car was assembled with the Super Duty 455. Its disposition and/or whereabouts have remained unknown for 50 years. Its engine had been saved from being salvaged by a former GM engineer in the mid-1980s and its significance was recently uncovered. Here’s how!