Scorpion Roller Rockers
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TECH Apprentice
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Join Date: Oct 2005
Location: VA
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I ran scorpion 1.7s on my bolt on LT1 and would recommend them to anyone. I picked up over a tenth and over 2 mph going from 1.6s to 1.7s, so they're worth it. Mine were for 7/16" rocker studs and I would suggest that as well. You can raise the lift on the CC503 to .570/.578 with the 1.7s. That's a ton more lift than with the 1.6s(.537/.544). Good luck and rest assured that Scorpion rockers are a good brand.