The shafts were made numerous ways, dependingOctober 12 2017 at 2:45 PM
john vermeersch (Select Login johnvermeersch501)
Response to Hydraulic rocker shaft adjustable rockers
on vendor, 8 holes / 6 holes / with and without an extra at each end for more oil return....some had slots with the holes, they all seem to work fine....BE SURE the oil holes are pointed down !!!