Hey all , wondering what everyone is doing for nailhead rocker arms . I was able to get new rocker arm shafts and i had some NOS rocker arms but not enough to finish both heads . The GM part number i,m looking for is 1187800 , thats the number on the box anyway and the last 3 digits on the rocker arm its self is 317 .
i,m using the BUICK cast aluminum valve covers so the roller rockers won't work .