Note: 1.7 ratio rocker arms with 7/16" adjusting nuts. On 68-71 engines equipped with bottleneck studs, install 99159-16 straight 7/16" studs to permit valve adjustment. The 72-97 engines equipped with pedestal mount rocker arms can use our 35655-16 Conversion Kit for 3/8" pushrods (no machining required) for street applications. Street/Strip Rocker Arms 13744-16$251.20 Street/Strip Rocker Arm 13744-1$15.70 7/16" Rocker Arm Studs Set/16 99159-16$56.00 Pushrod Guideplate Conversion Kit 35655-16$138.00