Several factors come into play with this. Raising compression, 30 degree combustion chamber, and getting the squish band dialed in. All of these things require less timing to make power. Especially the 30 degree chambers and squish band. The 10.5:1 compression isn’t really high enough to make such a difference. In my case it would because I’m at almost 12:1. I could whip you up a better base timing map if you like. Let me know. What year is your 12?