Yes. 261 with Progressive triple B's (from 235's) with PCV drawing from the crankcase and a breather in the valvecover tied to the middle air cleaner.
I hooked up an air/fuel gauge and found that I'm running a little lean at idle. I am running a 54 main jet in the middle carb. I have a small amount of air leaking past the throttle plates on the end carbs, if I could stop that air leaking by, it would be fine. My carb is responsive to idle screw adjustments and I only have about 11" of vac due to the camshaft I'm running.
If you decrease the size of the hose too much, then the system serves no purpose.
What size jet are you running?
Have you verified that you have no other vac leaks?
What is the condition of the carb?
Is the engine completely sealed, or can fresh air enter the engine via a breather or slots in the valve cover?
