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I'm using a 2004 LS6 cam and valvetrain on my 4.8 turbo build. I heard that with I have to use a little bit longer pushrod cause the cam is slightly smaller in radius. What size rod would be appropriate ? Stock is 7.4 right ?
Yes. the Later LS6 cam use the small base circle and you would need 7.425" rod.. The difference is the a LS6 engine used longer Valves in the Heads as compared to the LS1 valve/heads.