New Carb Recommendation

Use a 3/32 allen wrench and turn the screw in the vac can clockwise until your idle timing comes up to about 30*. That should help.
The best thing you can do for that engine is swap the eddy carb for a carb that's suitable for that cam duration and the vacuum signal it's producing.

Quick-Fuel SS-680Vac is the right carb but you need to change the Idle Air Bleeds in it to get the idle nice.