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I also did not notice that you had a vacume seconary carb
However--your ignition curve isn't fast enough to give you the advance you need off idle--try this to prove/disprove it---if you have a MSD dist, take one spring off and using a piece of wire tie the advance mech in full closed position, start the car and check timing, then advance dist to around 40 degrees, and see if the bog is gone--(you probably will need to reset the timing to shut off the engine without dieseling or kill it in gear)
work with this until you find the timing needed at idle to eliminate the bog and then set your curve with that as initial and whatever springs/weights you need to get all your advance in by 2000 rpm--or you will never have full advance at cruising rpm---
Also you didn't say that you tried a lower PV and generally I find the 750 nvac carbs work better around # 70 primary jets.
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