pull the pan and clear everything. do this-

unhook and unbolt the exhaust, support it at the rear with a bungie cord. DON't let it hang, broken pipe or manifold.

remove fan, shroud and radiator hoses.

unbolt the motor mounts and hike it up with an engine hoist. get it high enough and the pan can come out. been 20 yrs since i've done this so i might've forgotten something.

pull the valve cover and crank the motor by hand to make sure all the bits are out. a piece caught it the chain will make it jump. with all the pieces in hand, assemble the puzzle. any hunk missing will mean an issue. good luck, chuck.