Thank you for your input. I was concerned about starving the circulation, yet looking for a solution to the drain back. The cooler is mounted behind the nose of the car about 2/3 of the way up the radiator.
I wouldn’t worry so much about converter drainback. It’s just the nature of the beast. I’d be more worried about a valve failing, and like you said, starving the trans of fluid. That’s a bigger problem than drainback from sitting.