Clunk in front end
#1
#2
check for play in the ball joints and hub bearings (pushing in and out on the tire/ up and down for ball joints with tire off ground) If nothing seems out of the ordinary, jack the whole front end up off the ground and have someone turn the wheel while you lay under the truck and try to locate the noise. Sometimes it helps to put your hands up on the front end parts and try to trace the clunk by feel
#3