Hood scoops are not an option, it is in a 69 charger I am restoring, 160 thermostat is fine, but in NJ E85 stations are few and far between. Really don't want to have to add octane booster, plus I don't really know how well the stuff works, I wouldn't have a problem knocking the timing back 2 or 4 degrees. But what I don't want is to mix race fuel, and then get stuck somewhere having to get gas and worry about it because I don't have 5 gallons of Sunoco puprple to add. Thats why I am looking for advice if I should just put the .060 head gaskets in and run 10.2 with the 93 octane fuel, or if running the .039 gasket with the quench is gonna give me better shot at not having detonation than trying to knock it down some.