I just pulled my engine in a 2005 2.5 n/a car with 120k on it to do the head gasket. Figured I would Check on the clutch when it's apart even though it seems strong. Found the clutch disc to have maybe 25 percent of useable material left. I should just replace it while I have the chance, but what about the flywheel. The surface looks very good for the mileage, can I get away with just a new disc and pressure plate? I know you are not supposed to machine he flywheel in these cars. And a replacement flywheel is close to $300. Any input?