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Notice something missing? Production 2+2s wear a huge glass bubble of a backlite that’s designed specifically to slip through the air at 200-mph NASCAR race speeds. The problem was that the one-piece glass was so long, Pontiac had to compensate with a mail slot for a trunk lid. Also, each installation called for a ton of hand fitment work that wasn’t assembly-line friendly. Not here. Notice how the trunk lid is fullsize to allow complete access—also note the 270-degree duckbill spoiler. Rendered in plastic, this molded trunk lid was very likely considered a wind tunnel alternative to the glass bubble layout that ended up in production. With this structure, building the 2+2 wouldn’t need any extra bodywork other than substituting this simple trunk lid, and customers couldn’t complain about the tiny trunk opening. That said, the failure of this configuration to reach production is likely based on its failure to perform as well as the glass bubble in the wind tunnel. Truth be told, we’re glad this deal died.