L672LS6V

hey all, been trying to get the hang of this and I keep seeing spark retard at higher manifold pressures and its driving me bananas..could a rich condition cause this? I've noticed when feathering the throttle at the time of retard it sounds like its either being flooded, or its not getting enough fuel, should I make changes in the Main VE or the High Octane tables? 93 octane and I added 2.75 gal of 110 to the tank.

Ill attach the tune file and log