Try a little more detailed description of the problem. Do you mean the vacuum advance is in the "full-advance" position all the time? If so, you're either connected to the wrong vacuum port or there's an internal problem in the carburetor. Generally, the vacuum port in the carb only has vacuum on it in the "off-idle" position. If the idle speed screw is turned too far clockwise it can result in the throttle plate uncovering the port for the distributor line and resulting in vacuum being on the line all the time, but that will usually result in a too-fast idle speed. If the initial timing is WAAAAAYYYY too late it might be necessary to open the throttle that far to keep the engine running, but other performance problems would also be present. Is it possible you've got the distributor vacuum line connected to the intake manifold instead of the carburetor?
Jerry

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