In 43 years, not ONE legitimate,, documented LS-6, 4 speed 454, or convertible has EVER surfaced. If one or four or ten existed, it would have surfaced by now. Whoever got it new would have known how unique it was and would have at least passed on the story when it changed hands. There are tons of "my brothers barbers next door neighbor had one" or "I remember sitting in one on the showroom floor" story's but not ONE real, documented car yet. 43 years and still waiting....... Just my opinion, I could be wrong...