I have a 454 that is .60 over. I had it built about 13 years ago. But I have barely ran it. It is just a summer hot rod. It has chevy heads that are pretty modified. I have forged pistons and with the heads that are on it the compression is 12:1 I have always used race gas in it. But I have had it with the price of race gas and want to be able to run 93 or 94 octane. I know I can change the heads. Or pistons. I would really hate to do either. I have had people tell me to change the carb and run E85. I hear mixed opinions about that. Any opinions on the best and easiest way? I figure I need it below 11:1 to use pump gas. Anyone here use E85?