i was having the same issues trav
i put in the 160 tstat.. .got my tune setup for efans.. cuz trucks with clutch fans dont have that setup in the tune, made a harness, got efans on the cheap.. and its been ok.. until i blow a fuse then the temp goes up.. but normally stays at 180, even sitting in traffic.. i figured out my fuse popping issue, so now thats not a problem.