I have a 2003 dodge ram 1500 4x4 with the 4.7 in. I know you all have probably seen threads like this way to often, but this noise really has me concerned. Please if you would copy and paste the video link below and let me know what you think. Truck only has 93,000 miles and runs good. I'm thinking hopefully it's just broken manifold bolts since I have one broken on the passenger side.
https://m.youtube.com/watch?feature=youtube_gdata_player&v=Uex_z_7XPpw

 

Links not working on my phone but just from your description I'd bet it's just a manifold bolt. The 4.7 HO in my Jeep had the rearmost two on the driver's side snap the heads off and it'd clatter like an old diesel till it warmed up...

 

Well that's good to hear. That's what I'm hoping is wrong because it does kinda sound like a diesel when I cold start it lol