Bolt on aluminum heads kind of a no brainer. Even if you end up going with CopyMaster... I mean... Speedmaster. By the time you rebuild the #62 heads and even have them ported or cleaned up a tad, you'd be real close to a set of new aluminum heads that also will give you more power and less weight. Do it once, do it right. Out of box D port Kauffman are great.
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