Any trick to getting off gasket from oil pan? Do all 4 headers get gaskets?

[86FJNJ]

Took oil pan off to check and replace gasket. Having a hard time getting gasket off, is there any trick to it? I tried using a sharp razor but that seems to scrape into the metal so I stopped.

Also when I pulled the exhaust there only appears to have been tow exhaust gaskets, there is one on pipe 3 and the other fell off so not sure where it was but I don't see any other gaskets in the heads. Do I put in 4 new gaskets? Did the last person who did this leave two out?

[fj1289]

Removing old gaskets from aluminum is a pain!

I think they make some hard plastic style scrapers for this. 

Look really carefully for exhaust gaskets - both in the head, and on the ends of the header pipes.  I've ended up with two gaskets in place before ... should have paid more attention!