I have one car that's able to run E85 fuel. I am unable to get any fuel here locally that is above E70. Engine is a 406 sbc, 12:1 compression. I have changed the car over to alcohol with a different carb. I would like to run the E85 setup, is it safe to run this on fuel that is probably still winter blend that is only E70? Would it hurt performance or hurt the engine if the ethanol level is low on a lower compression engine like this?.