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Need help on what push rod length for 5.3.

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Old 10-20-2014, 11:36 PM
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Default Need help on what push rod length for 5.3.

Doing a rebuild on a 5.3 and i got a ls6 cam and ls7 lifters and I'm going to mill the stock 5.3 heads .030. I've seen a lot of threads on the ls6 cam in a 5.3 but none are the same setup as mine... Can anyone help on what push rod length to get? Or who to go to for help? Thanks..
Old 10-21-2014, 12:51 PM
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Old 10-21-2014, 01:06 PM
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Buy/make an adj pr and measure it.
We use Manton. NOT cheap, but don't look like a pretzel @ 6K and 20psi boost.
Old 10-22-2014, 03:30 AM
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Missing one key piece of info that anyone wanting to guess pushrod length would need.

If you can't figure out what it is, sell your tools now. Frankly asking the question probably guarantees a bad outcome anyway.

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Old 10-22-2014, 08:56 AM
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You will have to check using an adjustable push rod length checker and doing the calculations. Plus you will need the head gaskets you plan to use and the old head bolts to torque everything down. The Comp Cams checker is cheap and easy to use and I torqued to 50 ftlbs for the check.
Old 10-22-2014, 08:56 PM
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Originally Posted by Aston Tibs
You will have to check using an adjustable push rod length checker and doing the calculations. Plus you will need the head gaskets you plan to use and the old head bolts to torque everything down. The Comp Cams checker is cheap and easy to use and I torqued to 50 ftlbs for the check.
Alright thanks man...just ordered the pushrod checker! Appreciate it!



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