1969 AMC AMX/3
"Starting with arguably the most unusual car on this list, the AMC AMX/3 was an American-designed, Italian-manufactured prototype. First unveiled at the 1970 Chicago Auto Show, this sleek muscular American supercar took blatant inspiration for the era’s exotic Italian automotive offerings. Despite being slated for a limited production run of 1,000 units, government safety regulations in the US would ultimately lead to the project’s abandonment after only five proto-specimens were produced (and some $2M dollars in R&D money was spent)."