So I took the 4Runner out for a spin after doing the valve cover work as well as the power steering line replacement and all seems to be going well with NO leaks. Hallej-f'g-lujah! Well it always remains to be seen, so I'm planning to take her for a longer drive tomorrow down the freeway when I drop off my cat at my mom's place tomorrow. But I have no doubt that the fixes actually worked. The big test will be the infamous CA Grapevine. I will be overjoyed when we pass up and over that hump in a few days.