Sorry, but I don't get it. I think you've gone to a lot of trouble to document a very, very nice LS6. But dropping the CR takes away much of what makes up the 1970 LS6. If it was me (and of course, it isn't -- it's your car and you can do what you wish, however you did solicit opinions), I'd be mixing gas. I'd ask myself how much do I really drive this thing a year. Five hundred miles? A thousand miles? How much trouble is it to buy some race fuel and mix it?

Wayne