You may be right on the shot peening. Dumb me, when rechecking the rod bolts, I had missed that they have an Eagle stamped into the ARP #2000 bolts. So am thinking that they are Eagle rods.
Thank you for all responses!
The eagle rods do not use an off the shelf arp bolt and you cannot buy replacements from arp. Arp makes them custom for eagle and you can buy new bolts directly from eagle. FYI
