Metal in oil

Agree. I have always broken in my stuff( after initial 1/2 hour cam breakin) by doing a long smokey burnout.
I also can’t say as I agree with an opinion somebody posted to swap out the valve springs for something lighter.
Springs being too light can cause enormous issues, spec the spring to what the cam manufacturer says, no sense doing otherwise
I contacted TRISTAR motors who built engine… and yes springs were spec to match Cam … thus the springs and dampers existing.
TRISTAR has been awesome answering questions I had on this 360LA / 350HP crate engine as far as what was used on Pistons and internals etc.
They provided Cam card as well.
Actually spoke with the guy that built it 3 years ago when I bought the car