E70 versus E85?

[72much1]

Just curious about running E70 instead of E85. Reason is local station is only carrying E70 and have to drive 30 miles to get E85 in an other town. Motor is a 357 Chevy with a F1R ProCharger pushing 20 + lbs of boost. Running a CSUs blow through 750. I know it's not Marks but I have friends running Marks Carb on NA motors. They suggested I contact Mark.
My compression is 9.5.1
Could I get by running the E70 by jetting down some and not have a issue of hurting the motor.
Just a little scared of hurting the motor if E70 is not enough.
Big difference from boosted set ups and NA on what will get by with out hurting.
Just curious of who has tested this under boosted applications.
Thanks for any help Mark,
Paul

[Mark Sullens]

you should call Kevin and ask him his opinion...I dont think E70 is the right choice.

[72much1]

Kevin suggested to leave timing alone and jet down front and back. Jetted front down 3 secondaries down 2. AFR reading around 11.3 full throttle and plugs look good also. Everyone at the track was running 2 + tenths slower than the week before and every ones MPH was down also. We still pulled out a conservative 5.93 @ 118 mph on the crappy air that day on E70.