Have been running a 2.95 upper with the Incognito lower on E85 with a Dusterhoff tune, after talking with Curt he determined that we could go down to a 2.85. Got the 2.85 upper ordered from Curt, put on and tuned up for E85. Running great and made a noticeable difference even in this 107 degree heat in central Texas.
Unfortunately my set up is getting to the point that in order to run faster I'll need larger injectors and a boost a pump. I've never liked the idea of the boost a pump so I may be sitting at my current 17lbs of boost for the foreseeable future.