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....This is one of those jobs where total concentration is a must, unless you want to make 2 of these things.
Hi Vince,I use drill rod for all of my camshafts but they are left unhardened. I would suspect that trying to harden it would induce some warpage and without a means of grinding it would be junk. When using a cam with flat tappets like this one the lifters are also made from drill rod but they are hardened and polished. Over the years I have noticed no noticeable wear using this combination. gbritnell