You can try all you want, I did and all I got was a couple degrees here and there without knock retard starting... and that was with 92 octane, I'd get knock retard on stock table during shifts with 87.

The main spark advance in these is already pretty maxed out, people use it for performance SB engines. Compare it to a Corvette and it has like 10 more in some spots, but it also has aluminum headsm more gear and weights like half of a B body.

The spark advance coolant table is all 0 in warmed up areas, it adds a little when cold and if you get hot takes some away. Works quite well as is...