well i might not worry about it if i wont cause engine damage. cam is installed straight up. not sure of the centerline. rules state "pump gas 95 octane max" and e-85 has to much octane. sucks cause i had a guy that developed bg's e-85 carb that was gunna sponsor me. dont need race fuel to beat the chevy cheaters any how. just didnt want to beat the ol' 446 up more than i had to. feels better when all the cheaters can't figure out what you are doing. they cant believe they get smoked by a mopar!!!!