Vortec rocker arm stud
#2
It depends on the rocker arm you plan on running. The part that screws into the head is a 7/16-14 NC thread on both the 3/8 studs and the 7/16 studs. The part that sticks up that you put the rocker arm on will need to match the rocker arms you plan to
use.
Botch
use.
Botch
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