I got a 140, 100, 160, 160 reading on my compression test, so the head is off. It was just a bad head gasket as far as I can tell. It looks like someone half ***ed a replacement before they sold me the car. I'm going to have to resurface the head because I scratched it on the dowel like an idiot. While the head is apart, is there anything else you recommend replacing? Valves, guides, keepers, springs, etc? Should I lap the valves or just make sure they're put back in the same location?