Eddy 1407

she just wont idle under 1000-1100 rpm. timing is good. rpm's still dropping to about 500 in gear. i have the lightest step up springs in there and the passenger side spring is still bouncing in there.

i did notice that the carb had a date stamped into it from 1994 when i rebuilt it.

With that much of an rpm drop, it sounds more like a problem with the vacuum advance plugged into full manifold vacuum instead of timed vacuum. Have you tried to disconnect the vacuum advance and run it that way? You keep saying the timing is good, but no actual numbers.