vacuum advance problem

[jaybyrd66]

got a problem guys. my 66 has an 86 model 350 in it with hei distributor. she will start right up and idle just fine but when i slowly rev it up it will start to stutter like its got a rev limiter, but when i unplug the vacuum advance she will smooth out and rev just fine and if i plug it back up it will start to stutter again. if i drive it with the advance unplugged it doesnt have any power at all so that aint gonna work lol. ive replaced my advance curve weights and springs and also replaced the diaghram that the vacuum line attaches too and its not fixed it yet. any ideas? i really hope so lol