I owned an EA and EB and they both blew head gaskets after 200+k. From memory it was a known fault of the motor and they all did it. One of the experts might confirm that but if you haven't had the head done it might be something to bear in mind if you need to spend 1000's on oil leaks.
It's a headache if you are still happy with the car, I'm in a similar predicament with a VR Commodore that my son drives.
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