Hearing thumping noise from radiator mount

[JayDubBlazer]

So I've heard it a couple times. A thumping noise on my front clip of my truck. At first I thought it was the motor but yesterday I narrowed it down to the radiator support. I had did a frame up on this truck about four years ago but this is really the first time I've gotten to work on it. Well I think the core support is sitting directly on the frame. I did every but the body work on the truck and I think the body man put it together wrong. Does anyone have any pictures of how they go together? I will try and take some pictures tomorrow. I saw how the bolts go together on the LMC website and I doing think mine's correct.
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