New engine finally in!, 123 distributor 4RV Options

[Chad911sc]

So after 5 long months of work, I finally have the 2056 built and installed. (IMG:style_emoticons/default/piratenanner.gif)
I have a couple questions about the 123 4RV distributor. I haven’t hooked it up to power yet, but from my understanding, you hook up only the red wire and then power the ignition and a light should come on in the body of the distributor.
1) Since our motors go in a CW direction, the first movement of the distributor goes clockwise until the light turns off? Then CCW until the green light comes on? Correct?
2) The engine has dual carb Webber 40’s/Web cam 86a/Mild port and polished stock valve heads. My question is what setting should I use on the distributor? From what I see it looks like curve #3. Does this sound right?
3) Do I use the vacuum port on the distributor body to the base of one of my carbs, or do I plug it off, or do I leave it open?

Thanks in advance for any info!

[technicalninja]

Vacuum advance is helpful for street. Will improve acceleration from high vacuum conditions (cruise at 2500rpm).

It's added complexity for a track focused car that is never at "cruise".

I'd use the vacuum advance, but I'd make a little plenum and run at least two (opposite in firing order) intake sources. All 4 are better.

The problem with ITB set ups is each tube only sees a single vacuum pulse for each 720 degrees of revolution. At low speed its "choppy".

Try without, then hook up a single hose(easy), and if you see improvements look into the MAP plenum I mentioned.

Use a manifold vacuum source. Full vacuum at idle.

Avoid ported vacuum (none at closed throttle, increases as throttle opens) for a performance application.

Ported vacuum (and vacuum retards) are IMPORTANT for early emissions reasons/equipment.