Looking at your combo, I'd say you're doing alright already. If you're looking for best et and not worried about fuel mileage, you should switch to a 410-430 gear.
Also the tune up and air bleeds on the mighty demon are set up for a pretty stout combo (cam 240 degrees+ @.050, 11.5:1+ compression) so it may need some changes to work with a milder combo. Worth looking into anyways.
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