Vortec performance heads 906 casting 1.94/1.50 stainless polished valves 64cc chambers 3/8'' screw in studs hi performance springs .550 lift hyd flat tappet. PC seals, hardened locks, retainers and seats, 5 angle valve job. Guide bosses are machined for lift over .480''. $450.00 plus 50.00 shipping to the lower 48. pay pal only. Pictures at lzgoda@roadrunner.com