[dsraven]

a tray like this could be made out of wood you may have laying around. less holes would be needed because the head wouldn't be coming apart. a hole for the lifter and the corresponding pushrod, marked for front. when removing the rocker shaft put a wrap of wire on the front end for marking.
diesel fuel works pretty well for a cleaner and also lubricates if not washed off. garden sprayer works well for pressurizing a stream to wash out oil galleries etc.