brian6pac said

Yep, it sounds like you don't have enough vacuum to hold the power pistons down and it's just to rich when it idles down, you probably need lighter springs in the power pistons. Does it have a vacuum advance on the dist, unplug it and see if it will idle. Shut the throttle plates all the way and turn the idle screw in about 1 turn after it hits the throttle shaft, turn the idle mixture screws out 2 turns, disconnect vacuum to dist and see if it runs.

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KitCarlson said

If the base timing advance was set at 1500, then 10 degrees is not enough. If the vacuum advance is in, with throttle open too much, as you try to set idle speed down, timing will be way too retarded. If you know how to set static time try 15 degrees or a few more, otherwise try 20 to 25 degrees at 1500 RPM, then reset as idle and mixture are tuned.

Also check the throttle plates, primary and secondary, see if they are able to close properly. The primary needs to be per post #8, to insure idle circuit functions.

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