New to site, new to Mopar overheating issues

I've been running Champion Radiators in both my Dusters without a shroud and one of them has a underdrive crank pulley and both have a 160 thermostat and both have clutch fans. Neither one overheat on any day that i chose to cruise. Now, I don't sit in a bank drive through for 30 minutes idling so i don't know what they would do in that situation, but I'm sure if i did that I'd install a shroud and not have a issue. Champion radiators fit nice and were about 200 or less shipped to my door.