just posted about these bolts on the "new Hyundai motor" thread.
By the FSM , you'll need 12mm , "7" grade on head, probably 1.25 pitch but not real sure on that.
Hope you find them <img src="/forums/images/graemlins/cheers.gif" alt="" />

dave h.
'89 Raider V6 5spd;Aisin Hubs;; Gen2 LS: frt. brakes, rear coils;U.C.arms;R.trailing arms;idler arm; rear LSD axle w.disc brakes ;2 battery system for Dog's fan; relocated ECU; custom bumpers;J.Baker receiver;Conferr roofrack; t-bar crank.