Engine requires 20 degrees of initial to idle well...

30 degrees initial advance ?
Hooo Doggie ! If that's the case you would be around 46-50 at full advance.
Can you say Kaboom !!!
Depending on your distributor,it should be setup around
12-16 initial 34-36 full advance.
Is your balancer marked to true TDC ?
Was the cam degreed, or put in straight up ?
Have you checked for vacuum leaks around the manifold,carb base ?
Do you know how to adjust Ede carbs ? The A/F ratio has to be close to idle right.