Yeah, it's an old Swift truck. It's one of the blue ones though, so it's spec'd better than the plain jane white ones. I was able to look at the lifetime mileage when we adjusted the road speed and took off the idle shutdown and it said somewhere in the neighborhood of 6.8 lifetime. When I first drove the truck it would only do 65, and I'm guessing it had never been over that before.
I hope for my sake it works out
If it doesn't, maybe I'll have to look into re-gearing it to 3.55 or so. So I hope you're wrong, but I appreciate the information.