727 Issue With 2-3 Upshift

The throttle lever on the trans is the one from the Bouchillion kit as well as the carb adaptor, hooked up per their directions. 800cfm Edelbrock Thunder carb and adaptors.
I'm puzzled because there is no sweet spot in adjustment. The governor is being kept from working at wot.

I have the A500OD trans (904 with overdrive) with the TF2 kit and the cable TP and my "sweet spot" is about within .020 of cable adjustment.
Point is, maybe you are adjusting it back and forth too much and missing it.