Al i would think a number 7 plug is board line cold for e85 and 11 to 1 compression just my 2 cents but when i made the switch over to e85 albeit a boosted motor but the car ran better with a set of normal temp range plugs then a set of colder ones like most suggested thats proably why you could get away with so much timing
I asked the question on page one about your afr and plug gap if you dont have a Wideband id suggest getting one
Good luck