It is a th350c 3000 stall built by dynamic converter and followed the manufactures cooler instructions. With the drivetrain it is locked up at 65mph. Backing up with a trailer there is no problem. Normal driving it isnt noticeable . It footbrakes to 2200rpm for a big launch. Temps are normal. Not really sure what tow condition you are worried about. Pulled a weight distribution hitch with 7500lbs trailer, and it was fine.
Most newer trucks have 2600+ stalls.
If you have some concern about stall converters contact dynamic converter. An automatic drivetrain that works together as a package is priceless. The trans can be pulled back in a afternoon , not a big project. Should install a shift kit while you are under there.