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I have a 331 from DSS racing with an I beam rod and the cylinder bores are not notched for clearance!!! They say with an I beam rod you do not have to notch the cylinder!! Is this true??? ONLY with the H beam rod!!
 

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If the rods clear the cylinder bottoms by at least .050" then you're fine. If not, notch them to clear. I'm sure you can see how close they are coming to the bores since you already noticed the bore bottoms don't have notches. .050" or more clearance is safe.
 
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