TrailerParkGinger

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  • Been reading your thread on summit cam for a 318, and yeah, I've watched it snowball. A decent upgrade is to change the valve springs to OEM 340 springs. P/N VS678 from rockauto. Stock springs only supported rpm's up to 4400 and then you would experience valve float. I upgraded to the 340 springs and my internally stock and yes stock cam 1968 318 will rev 5200-5500 rpm
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