Lowering the front float to the bottom of the sight glass helped lean out the 60mph A/F by .2. Raising the rear float to the middle of the sight glass helped richen the 50-WOT by .2 also.
Last year my 30-70mph A/F readings were 14.0-14.6 and I was not running vacuum advance.
After this last test, I am now:
Idle in D: 13.6-13.8
40mph:14.0
50mph: 13.8
55mph: 13.6
60mph: 13.6
4000rpms (apx 75mph): 13.2
50mph to WOT: 12.8(D) 12.6(P)
You can see by the 4000rpm A/F reading that my .039" HSAB's are not leaning out the main circuit. So this setup should be good.
So this year while running with vacuum advance, my cruising range is apx 13.4-14.0. I feel surging aroung 14.4-14.6 or so with the VA hooked up. So this setup gives me some room before the surging starts. The car feels strong at cruising speeds to any accel. I am no longer leaning out into the 15's and it stays no leaner than 14.0.
I might try raising my rear float to about the 3/4 mark to see if I can richen up my 50-WOT readings to around the 12.5-12.6 range on both sides. 3/4 up is all the higher I want to raise the float to allow fuel expansion during heat soak and not have the fuel expand and want to come out of the boosters when shut off.
I have found that the floats are a real quick external adjustment to get about .3-.4 change in the A/F readings. I would like to find a happy medium with the internal parts of the carb so that all I need to do year around is tweak the float level as the outside temps rise/lower.

EDIT:
I have decided to keep the rear fuel level to the middle or below, so this means rejetting the secondaries. 78/78 rear jets gave me 12.0 (D) and 12.4 (P). 76/74 rear jets are currently giving me 12.8 (D) and 12.6 (P). I am going to stagger the rear jetting slightly more and test 78/74. I am thinking that since I am running a dual plane intake, that the 78's on the drivers side will richen the drivers side 12.8 reading and hopefully help richen the passenger side slightly too. The larger jet will allow me to keep my rear fuel level under the half way mark which allows more room for the fuel to expand during shut down.

EDIT:
The gas stations are allowed to start selling the Winter blend this coming Saturday, September 15. What does this do to our current A/F ratios, if any?