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An interesting and fortunate circumstance with the Magnum heads is that small-block Chevy rockers readily interchange. Make the change by swapping out the pedestals for a set of conversion studs that will thread into the OEM 5/16-inch rocker fastener provisions. Comp's No. 1425 Kit carries all the part to make the change to stud mount rockers, including pushrods.
Mopar Magnum Engine - Magnum De-Mystified

 An interesting and fortunate circumstance with the Magnum heads is that small-block Chevy rockers readily interchange. Make the change by swapping out the pedestals for a set of conversion studs that will thread into the OEM 5/16-inch rocker fastener provisions. Comp's No. 1425 Kit carries all the part to make the change to stud mount rockers, including pushrods.  View Related Article

 

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