If it was me I would just get BGE heads right now, they are much cheaper than getting your eagle heads ported and have even more potential down the road. I would never spend money getting eagles ported, they are awesome as is but the BGE is even more better.

Either way you could still take about .030 off those heads without getting too close to the valve seat and if you are gonna run E-85 get as much compression as you can for sure.