Got the head off, Both valves are broken off. the piston is gouged. the sleeve appears to have survived. i believe the head is salvageable. the cam timing dowel is snapped in half. Can i assume that the exhaust valve failed on its own and caused all the other damage. (the exhaust valve break is burnt and covered in soot while the intake valve break is clean) Anybody have a piston laying around? Should I get better pistons ,Ive heard they have a connecting rod flaw.?