took my head off because engine was overheating and oil and coolant were mixing, most likely a blown gasket. Had the head pressure tested and resurfaced. The machine shop said that it wasnt cracked and that when they resurfaced it they took "less then 5 off". Dont really know what that means...(<.005???). Im trying to decide what head gasket to get. Any recommendations? Also....the little disk that holds the lifter to the rocker arm(i think thats what it does), was missing on 6 of the lifters, and when the machine shop took the rocker arm assembly off, 6 of the lifters feel out...WTF?!? Is there anywhere i can get just that disk, or will i have to buy new lifters?