I'm pretty sure the engine will grenade before twisting it 65K. Just kidding, buy a new set of plugs and reuse the gaskets off the old ones along with the new ones.
All the other posts were entertaining and great to read through, but this one cut right to the point.
There is rod stretch, possible piston mismatches, and so on but the main point is he can drive his car, not hurt it futher by this solution and it cost a set of plugs.
At 6500 it might hit the plug again. (I know that was mean sorry)