I ran across that same 330 HP motor and since I'm replacing a 250 I will need the intake and carb, so this is a good setup. One thing I'm not sure of is the factor that determines the fuel octane required - I noticed that as the horsepower increases there comes a point where 92 octane is required - is this based on compression ratio? Is there a rule of thumb here? I would prefer to burn the 87 octane if possible.
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