Only problem you might have is valve springs being compressed in the same position for so many years and the stem seals. I would wonder about the rings sticking in the grooves on the pistons. The WD and oil might have taken care of the rings. It's hard for steel to rebound after long periods of stress.
Valve cover gaskets shrink a bunch also. Your going to see a lot of smoke off the engine after it warms up from oil seepage. Good luck and keep us posted on how it goes.