Reduce heat to 350 °F and roast until meat thermometer inserted into meaty part of thigh (without touching bone) and stuffing in cavity registers 165 °F, 2 1/2 to 3 hours longer. (prevention.com)
Roast until meat thermometer inserted in center registers 155 degrees, about 30 minutes. (dietsinreview.com)
I recommend checking the chicken's internal temperature with meat thermometer for safety. (cantillonkitchen.com)