am going thru the same issue. the hughes stud kit does use ARP hardware. I feel the thread engagement is inadequate. for maximum stud strength thread engagement must be at least stud diameter. these victor heads have had problems with splitting the stands. hughes offers an upgrade on rocker stand bolts where they lengthen the helicoil inserts in the head. problem is the studs don't allow for the deeper thread engagement. I have talked to ARP to see if they will offer studs with the longer threads, they said they have received request for this but had no plans to actually make some. don't have a solution yet