How do i elongate manifold bolt holes?
I used a dremel and a multipurpose bit (you might want a few extras, they don't cost much). There's not much to it, just take off a little at a time on one hole until you can put a bolt through it into the head without resistance. Once you get one right, just use it as a model for the other three. The heads of the bolts won't be perfectly lined up with the top of the manifold, but it should still hold just fine. If you're really worried about that, I suppose you could use a washer and some pipe with one end cut at an angle.
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