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Originally Posted by MarkM66
Those dyno numbers are very close to Steve Rupps high end LSX.
Go Gen1. 
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Like I said...with a fresh set of the proper plugs (I wasn't running the right ones

),play with the timing,run the valves,lose the clutch fan in favor of an electric one,and cool it down a bit...I know I could squeeze another 7-10hp outta it.