Stock ratio with enlarged stud diameter. Must machine 66-91 cylinder heads and install 99157-16 7/16" rocker arm stauds and aftermarket pushro guideplates. Special order heat treated pushrods are required for use with guideplates.
Crane Cams (view more products) CRA - CRANE CAMS: Cams, lifters and components A leading manufacturer of camshafts, valve trains, and electronic ignitions
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