You are buying one ARP 154-4201 12-Point Head Stud Kit for Ford Small Block 289-302 & 5.0L with 351W Style Heads 7/16"-14 Block Thread. Ford 289-302, 5.0L with 7/16-14 Block Thread and 351W Style Heads with 1/2" holes in the head.
ARP 154-4003 Cylinder Head Fasteners Ford Small Block Windsor 351W 6-Point Hex
ARP 154-4005 Cylinder Head Stud SB Ford Studs 7/16" with 1/2" insert washers
ARP 155-4201 Cylinder Head Fasteners Ford Big Block 390, 427, 428 12-Point
ARP 155-3601 Cylinder Head Bolt Kit Ford FE 390 428
ARP 154-4203 Cylinder Head Fasteners Ford Small Block Windsor 351W 12-Point
ARP 155-4001 Cylinder Head Fasteners Ford Big Block 390, 427, 428 Hex Head
