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It depends on just what is clicking. Usually it's a lifter that's gummy. If that's it, try adding a can of Rislone engine treatment to the oil. It might help. Also, open the valve cover, be sure the valve are operating correctly.
If it is a sticky lifter, and the Rislone doesn't stop the noise, the next step is new lifters. But as long as the lifter is working properly, the noise doesn't hurt anything. It just bugs the heck out of you.
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Fred
There is no such thing as too much cam...just not enough engine. 
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