any suggestions? started out getting this long block that was very clean inside. tried to rotate the crank only to get resistance on the bar. opened up valve cover to find 2 bent push rods. numbers 5&6 intake valves seized closed. soaked overnight in MMO. was able to get valves to break loose with brass hammer. now they are stuck partially open. i have now flipped the engine upside down and filled the intake port with KO blaster, valve guides are submerged in solution. any tricks to get them to move??? &