high water temp issues

let me know how you make out, im having an issue with my sons 416 Duster, fresh engine with Champion 3 core alum radiator with their shroud and 2 10" fans, car warms up really fast and climbs to 195 went to a cruse night on Monday and it got hotter and hotter the whole way there, got to over 220 ! im at wits end and need to figure out whats going on, it was only a 3 or 4 mile ride and outside temp was around 75 or so