While my stock original 400 WT with 670's was running seemingly fine on 91 octane plus 100 octane (50/50, sometimes even 25:75 mix to get 93-95 octane), I'm not taking a chance with my rebuild. Having Dave at SD work his chamber mod and then I'm looking for anywhere from 5-9cc's to come from a piston dish. Lastly I'm going to get the block zero-decked.
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