Default [Q] 4.3 rom on 4.2

quick question.

i have a stock rom (4.2.2) tmobile galaxy s4 with the ktoonz kernal, and i want to flash wicked v10 to it. wicked is a 4.3 rom, and im not trying to brick my phone.

ive been searching for a little bit, and i keep finding talk about flashing a bootloader and radio, or using odin to download a new modem... but i have yet to find any solid answers when it comes to this on the tmobile gs4. can someone provide some insight?