Chevy 505Ci Big Block Cylinder Heads Roller Rocker Arms
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To make sure we got every bit of lift and duration out of our cam, we installed a set of 1.75:1 roller rocker arms-this is the ratio Isky uses to calculate its big-block cam specs. The cam card called for 0.028-inch hot lash on both the intake and exhaust valves. Jeff Johnson set this clearance, then went back and reset it once the engine was hot. View Related Article
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