My old 440 with a 509 cam has been sitting about a year.
Fired it up today, it sounds just like a power steering pump low on fluid.
Sound went away a lot after it reached 180 degrees, but, still real faint in the back ground.
Oil pressure was 80 psi cold, 60 at idle hot.
There is no power steering pump on it, fired it up on test stand.
Has anyone had a noise like this before? Sounded like it was coming from upper end under the intake.