What I was saying is that this mod has been done a billion times over that there should be some common knowlege out there about what works. With the assortment of different valve sizes available these says this trick is obsolete. Just buy the right valves for your head. But this used to be the common thing to do, so there should be lots of good info out there.

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\'71 and a lot of FUN!!
351c-2v, 10:1, roller cam.