Have new ARP hd bolt kit,ARP #123-3603,and main stud kit,ARP # 123-5401 both brand new,in boxs`,and fit 86/87 engines,,,I`m selling em cause I got the wrong ones,I was building a 84 engine at the time and these are for the 86/87 engines,,,head bolt kit--$22,and the main stud kit $31,,both are plus shipping----from summit these sell for Hd bolt $33 and the main stud $46---will trade for 86/87 3"dp (poston type),chrome maf pipe,dutt neck for stock IC,hoses and t-bolt clamps for 86/87 IC,,let me know what ya got and lets make a deal,OR,I`ll sell ARP stuff outright----Jack