Yes, the 750 head bolts on. The 88-89 models are the ones that'll bump your compression. Not sure how much of a bump in compression it gives though. They have better ports, too.
Keep in mind if using any GSXR head on a Bandit bottom end, you need to use the Bandit's cam sprockets. GSXR cam sprockets and chains are different from the Bandit and NOT compatible. (You can still use the 88-89 750 cams, just transfer over the B12's cam sprockets.)