Not trying to be rude but I dont want to see you waste your money and time. If you do not have the new valves ground and matched to the seat then they will leak and burn up in a short time. Thats if they even seal at all. The seal between the valve and seat is a precision metal to metal seal with the sealing surface being a certain width so as the valve stays cool. You cannot take a valve out of the box, slap it in the head and expect a seal. Theres just a lot more to it then that.