Quote:

I am not familiar with a tapered seat plug, but it does have the taper on each hole. I had these heads machined about 6 years ago and that shop must have added the taper. I have been running the standard type of plug with the gasket ever since. Are tapered plugs easy to find? These are -7 NGK's.

Thanks allot for your replies.


Don't listen to me.LOL I just looked again at your pics and was looking at the wrong area. Sorry for getting this off track. A 3/4" reach gasket type plug is fine,I'd choose autolite 3923's but what you have if it's 3/4" reach will be ok as well.