A little help!!

Hey guys. So this is a start up of my newly rebuilt 360. New Cam, pistons, intake, etc. etc. This is a few days after cam break in was completed. Had no problems before. You'll notice some noise right about when I get up close to the engine with the camera. Does anyone have any idea where that is coming from?? Any help would be great! Thanks

[ame]http://http://www.youtube.com/watch?v=6g1ueoLENKY[/ame]