Not done the engine swap but that V6 is notorious for headgaskets going so make sure it's OK before you fit it.
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Yeah he's spotted an engine that's still in the car, pretty local so we can take a look at it. It's not actually the head gaskets that fail on them, it's the water pump that sheds it's impellers and causes the engine to overheat. Alloy block and head, so it's pretty much scrap if it's overheated to any major degree.