You would need to be in the stock, VRUDNE1 4.4.2 OTA before you could run any VRUDNE1 based rom. The firmware on the VRUDNE1 update actively prevents it from booting on mismatching or older firmware. So you'll need to 1) Odin VRUCML1 4.3 and OTA to VRUDNE1 or Odin VRUDNE1 2) use Towel root to get root access 3) use unofficial Safestrap tool 4) flash Super lite using unofficial Safestrap.
Once on VRUCML1 stock OTA or higher, there is no bootloader unlock. There is no more using AOSP. There is no flashing custom kernels.
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[VZW] Samsung Galaxy SIII