SimpleRick

Hey There, I'm currently in the middle of rebuilding my 2001 subaru wrx wagon i had recently bought a semi closed v8 sti block with forged internals. the block has been zero decked and it came with existing subaru legacy heads. after pulling the heads off i found that the valves had made contact with the pistons and had left some notches in the piston head. im afraid when i apply my wrx heads to the motor that the valves are going to collide with the pistons. what is a way i can get around this? i dont think there is enough clearance with just a factory gasket and im trying to avoid machining the heads entirely any ideas would be great