Sorry. I only have a smart phone. Tried making a video and it didn't pick up the noise.

 

after many months of frustration and fixing many things on the truck i am now 95% sure that it was an exhaust leak. HAHA! well its kinda funny. anyway i JB welded up the hole as best i can with 2 tubes. the noise was still present but much less. i am going to put another 2 tubes on with some aluminum tape to keep it in contact. it is right after the header pipe comes together as one off the manifold. big relief but also really annoying that i sunk a bunch of money and time on something so simple. probably bumped it when doing clutch.

 

Dont use JB weld. Its not meant to take the heat. They make an actual exhaust paste that wont burn off or, do it the right way and pull the down pipe off and have it welded.