Thread: rocker arms 292
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Old 07-21-2010, 08:46 PM   #2
RichardJ
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Join Date: Apr 2010
Location: So Cal
Posts: 1,489
Re: rocker arms 292

His may be 7/16", but yours are probably the original 3/8".
It's doubtfull you would see any gain, even with a warmed up engine. Most aftermarket rockers have clearance issues on the end rockers and require a different valve cover.
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'67 GMC 2500, 292, 4spd, AC
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