[CWizard]

I stupidly damaged the first couple of threads in one of the spark plug holes. I ran a thread chaser through, and that appears to have fixed it. The plug goes in ok, but seems not to snug quite as tight as normal. This may be just my timidity, not wanting to completely strip the threads in the head. Assuming the current fix proves unsat, does anyone have suggestions for a better solution?
Many thanks,
Jerry