Advancing stock cam in a 360?

Advancing the cam 4* on any cam will cause the intake valve to close sooner and closing the valve sooner helps build cylinder pressure and increase pressure equals an increase in both torque and power, how much difference I don't know but since your installing a new timing chain why not Advance the cam. Every little bit helps
Be careful using words like “any”, “every”, “always”, etc. The results with things like cam timing are rarely definitive. For example, if the cam has 4 degrees ground in already, and you move it forward 4 more degrees, do you think what you said would still hold true?