Help weird noise??? Video Included!!!
 

Hey 240sx Wizards, lately my child has been making some very funny noises... :(

Don't flame i'm still new to this!!

I want to say i narrowed it down to the driveshaft but it seems like it could be something else? It's kinda weird it behaves when it wants too. Some times it's a noisy ass tractor. Sometimes it's mellow. I tend to notice that the sound increases or gets louder around 40~mph. Everything on the car is stock.. maybe that's why I was thinking drive shaft (22 years old + 2 piece) The noise is coming around the dash + center console sounds like rattling or something! Can't put my finger on it!

If anyone has any inputs, ideas, or solutions please let me know! Anything is greatly appreciated..

Not timing guide or wheel bearings checked those!

Video link below!

Youtube link just in case
 

Are you not running an exhaust past the cat? Because if you're not, it's hard to tell what's making the sound beyond the heat shield that is where the cat belongs.