Problem with Arrow Rebuild & Question

GATOR SERPENT

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Ponte Vedra Beach, FL USA
Got my engine back from Arrow and the car was missing in all gears.(Posted the other day) Mechanic went through the engine and found (2)two spark plugs with bent gaps in them. He changed them and is running great. Two Questions:

1)How could the engine run on the Dyno without a problem?

2)If they Dyno the car at red line, why the break in period?

I still can't figure out how they bent them! Thanks
 

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