Yes 3,4,7+8 all have same mark they all need to be switched so the valve reliefs line up. I threw the heads on their side and filled the runners W/ fuel and no leakage, If the valves are bent the triple springs are keeping them well seated. I saw no marks on the valves, but it looks like the piston was hitting the casting flange of the valve seat. which is feasible with the deck height.
