The Dorman uppipes require some dressing with a stone in the baby's butt (collector), but they really do make a significant difference.
You probably have the 7.3L cooler. Switch over to a 6.0 cooler (around $100)- ASAP if you're plowing. Major difference in cooling ability.
Since you have the F250, you likely don't have a dash trans gauge, but you can get the temp via OBDII port using something like TorquePro.
Throw another $150 and get a John Wood valve body. About an hour to swap it in (send your core back), and you change the fluid and filter while you're at it.
If you've been plowing with a stock setup, it's been abused. Not the end of the world, but you likely want to make these upgrades ASAP for cheap vs a new or rebuilt trans for $$$$