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13:1 compression on overbored custom piston, lightened internals, worked over crank, loads of head flow work, custom larger valves, agressive cams w/adjustable exhaust side gears, custom headers to accomodate a larger exhaust head outlet, oversized Z1 throttle bodies attached to an extrude honed uppper plenum/hand port matched lower, custom windage tray and oil pan, coating all the internals of the engine (EVERYTHING!), water/methanol injection for starters. So far, I know of two other reputable NA fanatics (like myself) on fairly tuned up NA's that are in the 260's right now. So, this goal is looking more and more attainable as we start blue printing out the motor. Any help and advice appreciated as well.
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