71 Dodge Dart Swinger in England

Carb rebuilt and back together. The float bowls where quiet dirty at the bottom and I found the floats where set incorrectly. Seem to run better now but don't think we have it 100% right.

I need to check the ignition timing and vac lines, as im sure it's not set up right.

Have a look at the photo below. This is how it came connected ie there was a hose on the red and yellow lines, ive plugged these for now to get it running just at tickover. Not sure if I need the red line from manifold to carb? surely this would just be pulling manifold vac through the carb? The vac line from the dizzy does that go to the yellow line, red side , or manifold vac?

My thoughts are the yellow line (RHS of carb as stood from the front) is the same as the the vac point on the manifold? and either of this is to be connected to the dizzy. and the red line is not need and should be plugged at the manifold and carb?

vac lines.jpg