clunking noise in front-end wheels on 1997 Dodge Ram Van 2500

Have clunking noise in front wheels when driving on rough roads. Front calpiers ,rotors,pads,shocks and bearings,stablizer bar bolts have been replaced.Tricky part is only happens i/2 hour when driving and continues to happen.

Asked by for the 1997 Dodge Ram Van 2500
check the tires