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You can still install Windows 8, but you won't be able to install the Windows support software and your MacBook won't work correctly.
I recommend you to install Windows 7 instead to make your MacBook run correctly in Windows. Follow Apple's steps > http://manuals.info.apple.com/en_US/boot_camp_install-setup_10.8.pdf
There's a thread where other users complained about this > https://discussions.apple.com/thread/4889654?start=0&tstart=0 As you can see, other users managed to install Windows 8. Don't install Windows through EFI mode