Default Can I install cm 11 or a stock kitkat rom that does not have touchwiz on my NB1?

I have a att s4 sgh-1337 with android 4.4.2. baseband version 1337UCUFNB1. I'm trying to put on CM 11. or another rom that looks like stock android with no touchwiz and 100% working and stable. if I downgrade to android 4.3. can I then root, install CWM recovery, and install CM 11?

what would happen if I booted into android system recovery and installed the cm 11 rom for my phone?