in December I replace both lower control arms and now mine is doing about the same as yours. I got under the right front and pushed and pulled up and down on the car using the bumper and could get it to make the noise. I think mine is the lower control arm. If I hold my hand on it at the same time I move the car up and down I can feel it while it makes the sound. Also if the upper control arm nuts are too tight you will get noise like that. Let us know if you resolve the problem and I will do the same.
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66' coupe
200 inline 6
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