Join Date: Aug 2002
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Re: Drilling and tapping of cylinder head required?
Since aftermarket valve cover has more than 2 bolts holding it to the head, you have to drill and tap. Mine has 3 'extra' screws on pass. side and 2 on driver's side. Drilling and taping in not that big of a deal, just make sure that you are drilling and tapping to the correct depth and that you are vertical to the head. I think that I got my valve from 4wd.com