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Pushrod length?

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Old Feb 28, 2025 | 09:40 PM
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4.8 3rdGenMaro's Avatar
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Default Pushrod length?

Im Getting a 600 Lift cam (PRT # - SUM-8728R1 )
On a stock block and crank, (2002 4.8 vortec) Stock aluminum heads, What size pushrods do i need? I found a set of 7.4 inch on FB with rocker arms includes, Will these work?

The springs with the kit dont matter i have some coming alongside the cam. Just wondering about the rods and rockers

FB DESCRIPTION:Ls Stock rockers, 7.4" chromoly pushrods, Summit Racing Beehive Springs. 130 lb. Seat pressure 1.290 o.d., handle up to .650 lift. Just broke in. Came out of my 5.3 gm vortec. Always maintained with no hard driving and properly broke in. The Beehive are best for harmonics so the springs won't "dance" on you. I believe 06-13 4.8, 5.3, 6.0, and 6.2

Thanks guys! im new to forums and LS engines but ive been watching for a little while.
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Old Mar 1, 2025 | 09:10 AM
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Just because it's used and all sold together doesn't mean it's right, if that's what you want I would install it then measure to make sure the Pushrod length is correct.
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Old Mar 1, 2025 | 11:08 AM
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What size pushrods do i need?
They're generally like 8mm or something. (5/16" for all practical purposes)

The Beehive are best for harmonics so the springs won't "dance" on you.
Beehives are stock in LS motors. Nothing special there.
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Old Mar 1, 2025 | 11:23 AM
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Originally Posted by RB04Av
They're generally like 8mm or something. (5/16" for all practical purposes)
Length in this case, not diameter..
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Old Mar 1, 2025 | 11:35 AM
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Oh that...

I thought he asked what size he needed. Which is why I quoted that.

As far as length, he needs exactly the same length as everyone else needs: whatever length that he sets his adjustable push rod to that exactly takes up all the end play without depressing the lifter plunger at all, plus his desired preload.
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