The reason the SIMM socket hits the keyboard is that this card is for TOWER mods of A1200. Whoever sold you the card should have told you it's not for desktops.
You can hack it in as Matthew pointed out by sliding the fan, but you said there's still a problem with the socket.
One option is to trade it with another user's Apollo 1240 which is not the tower version.
Another is to unsolder the SIMM socket, but I *highly* recommend to NOT do that because you can damage the board and delicate tracks unless you have a lot of experience with soldering and some good tools.
And the third option: build a towered A1200 ;-)
