105 octane give or take a point or two and alky injection, not on E-85, I had mentioned in a earlier post that was before I started fooling around with the E-85, but the car ran just as strong or stronger on the E-85, when I turned on the alky on the lowest setting at 23lbs boost the car nosed over, turn off the alky and I felt like I just turned on the afterburner, car picked power tremendously, and why not the dbl. pumper, almost 600.00 that right now I can not afford, I did pop the headgasket and just got my heads back yesterday, so I'm going back to a conservative set up and race maybe only once a year at our local track and just drive the car like I have been , week ends only, I only put maybe a 1-2k miles a year on it, getting old and just want to enjoy driving more instead of racing. Hope that makes sense to some of you.
Ron