well when i got the cam cover off yesterday i couldnt get the spring to move at all it seemed frozen in the head. so i started thinking ok im gonna need a head, piston, ect. but come to find out after i get home from work my dad pulled the other half of the valve spring off and the valve went sliding into the cyclinder so now its just a matter of getting the valve back out and the pressurizing the cylinder. see how it holds up.