I just saw your earlier post on running E85. I live in Elk River, MN and drive a '69 Camaro running E85. Have you checked with HiTech Motorsport located here in Elk River? They specialize in tuning for E85 and have a dyno on sight. I converted my '69 to EFI and HiTech set up the tune. Runs great. Brian at HiTech should be able to answer any questions you have about the stock fuel delivery system and E85.
PS. Are you a member of the Northstar Camaro Club of Minnesota?
Any questions, feel free to contact me.
Steve