Looking for some info on how to do this and what is the preferred gasket set to use and like the older engines do I need gasket sealer and any recommendations on the proper tool for scraping the old gasket away

You can replace the rocker-cover seals with the engine in place, but it's tight. On the LS, remove the battery and the W-W reservoir. On the RS, remove the air-inlet plastic pipes.

But it's much easier to do if the engine is already removed for other work.

 

For my 2002 Forester, I bought a Magnum kit VS25021 on Amazon, for less than $25. It seals the rocker-cover tight and dry.

There's no sealant involved, just clean everything with rags, and bolt up. Take care not to overtorque the 10mm cover bolts, otherwise they'll snap off, or else strip the threads.

Ok thank you for the assistance it is greatly appreciated