ARP Head Stud Kit for 69-70 SB Ford Boss 302 w/ 7/16-14 Cylinder Block Threads. 70 For SB Ford Boss 302 w/ 7/16-14 Cylinder Block Threads. 5/8 hex, 3/16 Allen. CP Cometic ACL Ferrea and ARP Kits. Custom Made Package Deals. Head and Main Studs. Your address must be confirmed. Buyers who pay with unconfirmed addresses will not be accepted. We always look to satisfy our customers in whatever needs they may have.