The cam cover gasket can be tricky to get on without it folding over on itself. I've read someone installs it on the cover then ties fishing line around it to keep the gasket in place and when nearly seated, cut the lines and pull them out. I use a bit of grease on the cover mating surface when reinstalling the cover, the most difficult part of a valve adjustment!
I haven't done an oil filter canister gasket swap.

__________________
83 SD

84 CD