The govenor may look correctly positioned, but if the governor ounter weight is backwards the holes will not line up. A little bit of rotational movement is o-k. 10 degrees is kinda pushing it. A lot of guys cut a small piece off a rubber o-ring to install under the ball that positions the govenor. This is not a really a good modification in my opinion. AOD books do not detail the function of the counter weight. Yet older Cruise-O-Matic books do, and the AOD shares the same govenor design as the old Cruise-O's. The govenor is suppoed to fit slightly loose to bleed off some gov psi at low speeds. Then as the vehicle moves faster, centrifugal force on th gov counter weight pulls the govenor to seat tighter up against the output shaft. In turn creating a better seal and tranfering more gov psi. Those who do shim the ball effectively narrow the range of the govenor.
What do you mean the TV lever floats? As in lateral play---in and out?
About the 2-3 accu piston, I preffer to upgrade to the bonded 2-3 piston from the AODE/4R70W.
Are you sure you have the TV psi set correctly?