1990 Daytona 3.0 Mitsubushi engine - I have leaky camshaft seal plugs (driver's side, w/o sprockets) and wondering what is the best way to remove the old plugs without scoring the surface? I found an earlier post where someone described driving a screwdriver through the plug and then working it out. Is this the best way to do it or does anyone else have any suggestions? The service manual is vague. I want to make sure I don't damage the seat or do anything that could leave me with metal particles in the head. Thanks!