Sorry to disagree AMOCO, but you can't go back.
If JimKnuckles flashes a 4.3.x ROM (any 4.3 ROM) he will end up with an irreconcilable bootloop. This can only solved by flashing a ROM with a version equal to or larger than what he was trying to downgrade from in the first place. (ie 4.4.2 to 4.4.2 or 4.4.4).