Ok, you can tell alot about the Machinist or Owner who Spec'ed out his Valvetrain. First of all you have what look like Comp Cams Big Block Chevy 7/16ths Screw in Studs. He is using the Stud Locks, you can see the Witness Mark's. The ends of the Studs were not "Trued". The Retainers are Comp Cams Steel with the Option for Lash Caps. They are 10 Degree Locks
