Gas Tank Vent Manifold

Ok what car BODY are you putting this in? There likely is no need for that mess. It was part of the evap control system (carbon canister) and essentially ties that all together into the line which went up front to the carbon can system. That line going up front IS the vent. There are other ways around that

You want to be careful here as you can create a non-venting problem, or a siphon problem

It's going in a '70 Duster.
Not trying to sound ungrateful for your reply, but I've got a full understanding of what it's for and where the line(s) go. My original question is just simply, are these available in the aftermarket world.
Since I'm using the Cuda tank, I might as well use the manifold to tie the 4 vent lines (one from each corner of the tank) into the single line going to the carbon canister.

Yes, this could be simplified. I can plug all of these outlets and just use the vent on the A body fuel filler neck. I can plug 3 outlets and run 1 line from the tank to the rear wheel well and vent to atmosphere. There are definitely options. I'm just trying to see of I can find the manifold or not.