General Maintenance & Repairs - 99 top end upgrade/rebuild list?

I got a 99 z28 and I got a valley gasket leak, so I wanna go ahead and replace all other gaskets,seals and sensors at same time...

Need help to make a list of everything I need and what stuff would be better to have off of 2002 model if differs...

Right now I got valley lifter gasket, intake manifold gasket, valve cover gaskets, I know I need to get vacuum hosing, oil pressure sender... What else do I need any upgrading I can do?

Side note I've already removed air pump and egr system...

You can get new knock sensors as well. Idk if you were planning to but now would be a good time to get an ls6 valley cover and eliminate your pcv system. Less oil consumption

Does ls6 valley fit without having ls6 intake? How do I know if knock sensors r bad? I got 148k on motor

Yes the ls6 valley cover will fit without an ls6 intake but you have to grind a tab on the inside of the valley. Idk of a real way to tell I they're going bad but since your in there might as well. change them

there is always a Positive Crankcase Ventilation system. Don't waste your money just buy some new hose and parts from your local parts store.