360 Tune Up

So my initial goal for this build was lots of low end power as opposed to HP. My car is a 72 B body so it's pretty heavy.
My current testing and adjustment has been mostly from a stop and a couple of low speed "passing gear" performance.
I have my initial set at 16 now mostly because I am concerned about my total timing numbers even though I am not hearing any detonation or pinging with 28 initial. I will be doing a combination of highway, twisties, hills and around town on my trip so this a pretty good test. I will also be running my AC at times. I'll mess with it some more next week.

If it's happy with more timing and there are no signs of detonation I'd leave it there. Maybe pull a few plugs to verify. What does taking 9 degrees of curb idle timing out leave you with all in?