I just purchased a 72 Duster with a 408 Stroker. Specs are Indy X series heads, 286 Hydraulic roller cam .544int/.541exh, aluminum roller rockers, forged internals, eagle crank. 750 holley double pumper mechanical. Previous owner said compression ratio was 10:3:1. He said he used 90 pump gas and 110 race fuel mix at 3 to 1. So a 16 gallon tank would be 12 gallons of 90 and 4 gallons 110. A 5 gallon container to order of 110 is $100 and not conducive for my picket book. Is 93 pump gas fine? And if so, is the 93 pump gas that has the small amount of ethanol ok? Or will the ethanol chew up my carburetor? There is 93 ethanol free on the otherside of town which means im gonna have to fill it up in containers to fill car cause driving over to fill will kill my gas coming back lol. Trying to figure out my best options. I was also told if i add stp carburetor and fuel treatment to a tank of 93 pump gas as a preventative it will help prevent deposit build up from the ethanol. Looking forward to help here thank you.
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