e85
I have been running E85 for two years now with a 11.7:1 360 with a .509 hyd. cam and J heads that have been worked over a little. The fuel switch alone was worth .25 and 4 mph in the quarter. Current setup run between 11.28 and 11.32 almost all the time in a 75 dart sport.
http://www.horsepowerinnovations.com did my carb. Eric is very good at building these carbs and stands behind his work. I just buy fuel from the gas station a barrel at a time and keep it sealed and off the concrete floor, it stays consistent.