The authorization to make a jump move doesn't make all jump moves legal or give give immunity from the list of balk moves:
6-2-4b: Failing to step with the pivot foot directly toward a base when throwing or feinting there in an attempt to put out or drive back a runner.
There is no way that a 270-degree turn can be construed as stepping directly toward a base.
6-2-4f: Failing to pitch when the entire non-pivot foot passes behind the perpendicular plane of the back edge of the pitcher's plate, except when feinting or throwing to second base in an attempt to put out a runner.
This rule outlaws 270-degree turns to either first or third. Runners on corner bases are entitled to know that the non-pivot foot going behind the rubber means that the pitcher is throwing home.
This is a no-doubter balk on both counts. There's a reason you don't see this move very often. That's because it's illegal.