Join Date: Dec 2002
Location: back in the Hew-Hess-Hay
Re: damaged spark plug
Well, those plugs oughta work by application for 71 and later heads, but since they are hitting I suggest you go with a NON extended tip plug. I don't know Autolite numbers, but in AC they would be something like R43T or R44T. Any AC plug with a "S" on the end is an extended tip plug and you'll be right back in the same situation. Who knows, the pistons may have bigger domes than normal, the block may have been decked, or the heads may have been milled a bunch. Whatever, you need plugs without the extended tips.
The only reason someone would want insurance is if they want to pay someone elses bills or want someone else to pay their bills.