Quote:
Originally Posted by estout81
Chamfer the plug hole.
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Are you kidding? Gary "GOSFAST" who is a professional engine builder has already given you the answer. Hell, I'm just an amatuer, and even I knew better. Autolite 216's (7/16" reach) in a a spark plug hole almost 3/4" deep? "Chamfering" the spark plug hole? These are aluminum heads; The manufacturers designed them with a longer reach because aluminum is not as strong as cast iron. What are you guys thinking?