No, I didn't think about checking the year of the replacement head. The last time it gave me trouble, I had just finished backflushing the cooling system and was driving it to circulate the coolant. When I got it torn apart, I couldn't see any cracks (always happened between the valves) and couldn't see any weak spot on the head gasket, but there was an indication that the #1 cylinder was pumping coolant. The time before that, it had cracked the replacement head and I had a machine shop repair the head with aluminum welding. Both of these times, the engine didn't overheat. It had just started leaking and the engine would try to lock up when spinning it over to start it.