Running a GM 2007 big block 502 with a new Holley 870 double pumper and HP-125 fuel pump in a 68 camaro. Normally I run 93 octane pump gas which of course I can only find in 10% ethanol around me, but I know where I can get 89 octane Ethanol-free gas. (it's a hike, about 11 miles away from me)...