Starting a BB Duster project

My big block has also ran very cool the entire time I’ve owned it. I’ve tried multiple stats and no stat, and it never really gets above 170ish. It’s peaked at 200 sitting in traffic on a hot day before, but doesn’t happen very often. My issue is that my EFI goes into closed loop at 180, so it never really self learns running at 170, I’ve got it dialed in good, but it could be better.