Seller notes

We strongly recommend using 7/16" rocker studs with todays fast cam rates and RPM capabilities as 3/8" Rocker Studs can occasionally break., Heads with 1.625" O.D springs will require some springs to be removed for access to some head bolts when installing the heads., Heads are designed for 5/16" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120" thick-wall pushrods., AFR 227/235cc Heads: Due to the "6...

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