I've been tinkering and picking brains a bit more and I think I've come up with a plan. Please take a look at this and make sure my thinking is straight before I implement.
Distributor is locked out at 45* advance,
Run Retard is set as below,
Idle timing 0-600 RPM -8* (37* actual)
1000-2000 RPM -18* (27* actual)
2800+ RPM -13* (32* actual)
Boost Retard is set as below
Full vacuum
17"-12.4" at idle or cruise -0* (37* idle, 27* 1000-2000 RPM)
9 psi (12.2" vacuum) -1* (26* actual 1000-2000 RPM)
10 psi (10.1" vacuum) -3.2* (23.8* actual 1000-2000 RPM)
11 psi (8.1" vacuum) -5.7* (21.3* actual 1000-2000 RPM)
12 psi (6.1" vacuum) -8.4* (18.6* actual 1000-2000 RPM) (23.6* 2800+ RPM)
13 psi (4" vacuum) -10.9* (16.1* actual 1000-2000 RPM) (21.1* 2800+ RPM)
13.5 psi (3" vacuum, WOT) -12* (15* actual 1000-2000 RPM) (20* 2800+ RPM)
On the idle side, the only thing I can think of is I might need to adjust the Run retard between 800 and 1000 so it remains at a steady state there as my idle fluctuates in that range and a moving timing mark will probably make it fluctuate more.
Maybe something more like this. Is that too sharp of a transition between 1000 and 1200 RPM?
On the WOT side, it appears that I need to make the Run Retard more like this so I can see full 32* timing 2800+ RPM
12 psi (6.1" vacuum) -8.4* (18.6* actual 1000-2000 RPM) (33.6* 2800+ RPM)
13 psi (4" vacuum) -10.9* (16.1* actual 1000-2000 RPM) (31.1* 2800+ RPM)
13.5 psi (3" vacuum, WOT) -12* (15* actual 1000-2000 RPM) (30* 2800+ RPM)
I'm not sure how to get those last three lines closer to the desired 32* timing at WOT past 2800 RPM? The variable is vacuum inches, not RPM...so it's almost back to my other method of stopping the Boost Retard right before WOT.