440 power gains/ aluminum head advantages?

PRH said
In two of the recent responses we have opposing views.
One view is to run 8 degrees of advance, the other is zero degrees of advance.
For most builds like yours I would typically be in between those two with 3-4 degrees of advance.

After you’ve done it for years, you’ll develop your own preference for where to start.
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when you say 3-4 degrees of advance is that from the lobe separation of. 108 or the recommended icl of 105. i know icl and lobe sep have no relation because one is the distance between the two cam lobe centerlines and one is just the position of the intake centerline but i want to clear some confusion for myself