clinking noise from bottom

[BlackMark8Li]

so ever since I installed the engine I hear this clinking noise from under the car. it happens when you put the car into drive and reverse and sometimes when driving or slowing down. I know its either 1 of 2 things.. 1. the driveshaft is making a noise from the u-joints.. and 2. the passenger header is hitting the frame and making that noise. anyone have a problem with the kooks headers rubbing the frame after the install? the k-member is aligned properly so thats not it.

 

[infinitcash]

it could be somehting hitting a hose or something.. check that out immedietly
any thing loose
or it could be bearings or somethign im not too educated
also if you rear wheel look for stuff on the driveshaft

 

[Ricksquickviii]

sounds like maybe the diff. rear mounts