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Old 11-27-2020, 04:13 PM   #21
gmc684x4
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Join Date: Jul 2012
Location: Whitehorse yukon
Posts: 1,218
Re: Performance Lacking in a 383 Build.

Do you have stock style stamped rocker arms?

"I have three questions
(1) I have read that I might need longer push rods for these heads? Im putting them on a 350 with stock stamped rocker ar ...read more
Asked by ROBERT on January 23, 2018

A:
(1) YES, if you choose to use OE stock stamped steel rocker arms, you need +.100" longer than stock push rods # 9629
(2) YES, however you need at minimum Hardened Washers under the OE stock head bolts, and you should confirm length before bolting on your engine.
(3) YES, your early model Performer intake manifold will bolt directly on without issues.
NOW, why would you consider Angle Spark Plug Cylinder Heads? The Angle Spark Plugs may not clear your exhaust. Why will you use stock stamped steel rocker arms, and hope the slot in your rocker arms accommodate the lift of the camshaft you're using. Thank you for your inquiry...."

https://www.summitracing.com/parts/edl-60995
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