I can't remember which ARP bolts I ordered from Summit years ago, butI didn't use Wave-loc's; the ones I used in these 1975 rods are U, 3/4 moon shaped. Rods are C9AE 6210-B in 5,7,3,2 cyl; and C9AE-B (2 S) in holes 6,8,4,1. Would either of you guys have a recommendation on possible different bolts?