For what its worth, I have seen several of those types in street rods that don't get the kind of use our cars may see. My point is that they were created as a packaging "first", engineering "second" cooler. I'm sure they work to some extent but being tucked away from major airflow can't be a good thing.
Look at what the OEMs do. They test, test and test. How long have tranny coolers been up front where the best airflow/cooling area is? Tend to trust OE design and engineering with decades of positive results. The other thing is, look at PT, road race, auto cross or any kind of motorsports where cooling is a primary need for parts survival.
I seriously doubt any of those types of cars are running that type of cooler.
As said above, maybe use it inline after the main cooler up front as a supplement?
The cost of a new tranny outwieghs any packaging issues for a cooler in my mind.
