440 power gains/ aluminum head advantages?

i just didn't know if there was some secret rule of thumb i didn't know about.

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.