I even unplugged all of the devices (PCV, advance, C4 vac line) from the carb and saw no change in vac signal. So if there is a vac leak, its the manifold seal.
Right?[/QUOTE]
If I understand what you saying you unplugged the vacuum hoses and it did not change the idle? If you unplug the c4 hose the vacuum and idle should change. If it does not then I think you have a bigger leak somewhere. Did you spray starter fluid around the intake runners with the engine running? That will help isolate a runner problem.