Won't start

I drove the Scamp to work today, so I just went outside to check. ;) The puck has a large breather hose to the air cleaner and maybe a 3/8" line to what appears to be a vapor return to the fuel tank. A separate PCV hose, also maybe 3/8", goes from the PCV to the base of the carb. The port next to this is where my distributor advance line is hooked up. Both of these ports face the valve cover. On the opposite side of the carb, there's a blocked off vacuum port.

Thanks for that comment about other manufacturers using manifold vacuum for the vcan. I have a Chevy and was fairly certain that uses manifold vacuum, so that makes sense. That port on my carb next to the PCV connection is ported vacuum (rather than manifold vacuum)? If it's ported vacuum, then it could be 6" at idle, couldn't it, since the throttle was not open? I'm trying to make sense of this, so forgive me if I'm way off.