452 heads Spark plugs?

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moparbarney

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For those running the 452 heads which spark plugs are you using. Seems like these heads should take a tapered plug. Regular plug seem to back out.
 
You have 452 of an "industrial" engine?? They run different plugs....I went through this a while ago. i'll see if I can dig up what I used...
 
Absolutely. They're totally different plugs. Ones a crush seal type deal and the other has a taper.
 
The head casting is preventing your current plus from dropping all the way in....look close. The bottom side of the plug housing has a little dimple that sticks out. I turned, and turned, and turned, til I figured it out. You need the Tapered ones.
 
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