[DeTomaso] What is this engine noise?

[sean mundy]

I can not figure out what this noise is or where its exactly coming from.  I’ve checked the rocker arms and they are all tight.
I have roller rockers and lifters.  Is this the sound if one of them is bad?

https://youtu.be/o4Q06VvjuWI


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   I can not figure out what this noise is or where its exactly coming
   from.  I've checked the rocker arms and they are all tight.
   I have roller rockers and lifters.  Is this the sound if one of them is
   bad?
   [1]https://youtu.be/o4Q06VvjuWI

References

   1. https://youtu.be/o4Q06VvjuWI