Yea you shouldn't have any problem installing Roms on mjb just make sure that the ROM you install does not install a downgraded bootloader or you will brick the device......also if a ROM uses the ne4 bootloader you will be stuck using the ne4 modem
If i helped hit the thanks button.
Current Device: Samsung Galaxy SIII (SGH-I747)
ROM: Stock Touchwiz Rom
Kernel: Stock 3.0.31-2024954
Previous Devices: Motorola Droid 1, Pantech Crossover, Motorola Droid X, LG Revolution, Sony Ericsson Xperia Play (r800x)