Disassembled rockers from cylinder head. I found I had to take these apart in order to get the head on easily.
The head gaskets have to be aligned in the head groove to get the head on properly - I put some oil in the groove and the gasket "stuck" in it long enough for me to get the head installed.
First I install the cylinder head with the pushods and pushrod covers in place and tighten the cylinder head screws. Then put on a rocker and get the pushrod end in the rocker socket, then push the shaft through part way. Then add the other rocker and push the shaft the rest of the way - make sure the flat on the shaft is aligned so the grub screw catches it. Secure with the grub screw.