This kit has been tested on a the 2.8/3.1 MPFI, 3100 SFI, 3400, and 3500 cylinder heads using the stock roller rocker arms. Includes 8 long studs, 8 short studs, 16 washers, and 16 12 point nuts. Recommened ARP moly lube is included. Studs should be installed hand tight and the nuts torqued dow…