1995 993 Timing Chain Cover/housing

[porsche boy]

I hope you can help me as I am a little frustrated and will ask my questions in point form. Want to do this job once, so need your help.
- Is Curil T ok on gaskets on this project. My research says yes but would like actual users to answer
- I think I need to do the rear large covers only. Is this normal or the the full housing a must.......take out motor etc
- anything else I need to know?
- once done...is it done for a long period

Would like porschephiles who have done this to give me some assurances as I find oil leaks a PITA. As always thank you,