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sbf 4.125 bore, 3.75 stroke, 64cc heads, 20.64cc dish pistons, -.004 deck. Was thinking of getting the Felpro MLS Jegs # 375-1134 - 4.101" to 4.175" @ .041" This is for a F1R. is the .041" ok or should I go thicker?
 
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