While COPO's were certainly not the dealer stocked car as a general rule I think the generally accepted number of 900-1000 shows that they were more known about than people would like to believe. Keep in mind the LS6 production was only 4475 so the COPO even as "mysterious" as I'm sure it was still sold roughly 25% of LS6 production. I agree nothing is "ironclad" but if I'm forking out 100k for a car..I'll take as much legit factory paperwork as possible...What is your perception of LS6 converts...roughly (in my opinion at least) 50 cars made..Highest advertised horsepower of the musclecar era in a convert no less...