Ive tuned out all kr and my ve table is nice and smooth with lt and stft's between +-5

I get kr whenever the converter locks in 4th with manifold pressure at 80+ kpa (under load) between 1200-1600 rpms after locked. Ive tried raising locking points even raising tcc voltage to get it to lock faster. I only get the knock immediately after it locks.

After the converter is locked in 4th at the same rpms and manifold kpa it doesnt knock?

Here's the kicker when running 110 octane under the same circumstances I wont get knock. So this leads me to believe its real knock and sometimes it will get to 4 degrees.
The timing is low enough at those points that I dont want to lower it any more and sacrifice my part throttle power.