Windage Tray Bolts

hi, if motor is assembled, do not drill and tap the holes!! ARP sells hardened washers that will fit fine. besides, that kind of work needs to be done in a milling machine to ensure accuracy. don't do it free hand!!! you will have a mess. use moly lube when torquing main bolts, and loctite on windage tray bolts or studs. just food for thought.