Exhaust gas temperature and towing

I monitor pre-turbo on my 250 7.3. It has a DP Tuner with a 40HP Tow program for hauling the RV. Several other tunes as well but for the purposes of this discussion, I will stick with the one tune. I have a 4 Inch Turbo back magnaflow exhaust, AFE Intake with Pro-Guard 7 filter and pre-filter sock, a Turbo Intake housing and make 333HP peak with 900ft/lbs of torque at peak. I have had a BTS transmission installed as well. With this setup, I can easily reach 1200 degrees when pulling up a hill if I dont back off. If I didnt watch the pyro and take my foot out of it, it will just downshift and pull the gates off hell until the truck explodes. The temp limit comes from the melting point of the pistons. I have already lost one head gasket and head gaskets do not go on these trucks as a rule. The old saying "You have to pay to play" certainly pertains to modifying trucks. A mild tune can make hauling much more enjoyable and even easier on the truck as it doesnt have to downshift. That Pyro gauge can save you a lot of hadaches if you pay attention to it.