383 noise

[jlr253]

My 383 has developed a metallic tapping noise. Sounds top end. Here's a video of the sound... Any ideas or where to start?

https://youtu.be/36UotUkTT78

[68dodge]

Hi

The first thing I would check is the exhaust manifold/header nuts/bolts are tightened and the gaskets are not blowing. I had what I thought was a top end mechanical noise on my 383 but turned out to be the exhaust manifold gaskets blowing and had to replace them.

[XH29N0G]

Is it the irregular tap tap that happens 4 or so times in the first part of the video or some other tapping noise?