2003 Subaru Forester Head Gasket/warranty

Hello, At 123,000 my Subaru began having Head Gasket leaks. Now at 140,000 it is heavy and needs a rebuild. At 93,000 miles the ignition wires needed to be replaced due to oil on the wires from leaking internal spark plug oil guides. Could this be related to the head gasket leakage? I'm asking because I had the 100,000 mi warranty. I asked Subaru for a good faith offer on the repair, as Foresters had a recall in '02 for Head Gasket problems, but they declined. I had all dealer servicing since I've had the vehicle. Any info or advice is appreciated. Thank you, Sam