Okay so I should replace all valve cover gaskets, as well as a few hoses? And two of the gaskets are sealed with RTV and not true gaskets correct? Should I replace the plenum gasket as well? I'm thinking this kit would work https://conceptzperformance.com/czp-valve-cover-gasket-set-nissan-300zx-90-96-z32-13270-czpkt_p_3861.php And lastly are there any bolts or washers that may need replacement? I watched a youtube video of someone replacing the valve cover gasket and they had special screws with what looked like crush washers.