Replace them. You're not replacing them due to age, you're replacing them due to their design. You have INA bearings currently, which lack every other needle bearing. You want Torrington bearings, which are almost solid needles, all the way around.
Higher lift cams= more downforce at the bearings and the need for a better bearing.
You can buy the tools off ebay (Remover and installers) for less than $150. The same guy also rents them, for a minimal fee.
Football Season is over....
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Praise the Lowered!
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RIP Rick Massey: AKA-Rubberdown. Godspeed, 02-02-12.