Some combos the low geared 904 can give you .2 over the 727 and yours sounds like it could possibly do that.

For e-85 you just need an e-85 carb, it could be worth .1 or .2 by itself. I gotta agree with doc, it would really like it if you bumped the compression 3 or 4 points though and it would easily be worth more than .2 in that case.