ctjackster,
I have spoken with a production-line worker that worked at the plant in 1965 producing 66 corvettes who distinctly remembers seeing several cars with blueline tires. As for the build sheets, it has been some time, but I, too, was just as curious as you, I do not remember the exact location/ verbiage of the blueline info on the sheet. I have only seen one in person, the others were voulunteered by customers on the telephone that said they "had to have blue lines because their build sheet said so." I have no reason to believe this to be bogus information and will make a note that the next conversation that I have with a customer that requests bluelines for their vette, to ask if they could make a copy of their build sheet for us all to view. I think it is exciting to find and learn obscure facts about these cars. Last fall we did receive note from the NCRS that they do not deduct points for blueline tires on 66 vettes anymore. This came on the heels of an irate member at a show that lost points.
Ron