Hmm. I was mostly after a plenum with better injector placement than a conventional 4bbl manifold. My thought was having the injectors at the ports would give better fuel distribution than centralized TBI.
I think a port divider could be made, but previous efforts seem to have run into a 'too thin to not bend under boost pressure' condition. Of course, they were looking to go way past my low boost low rpm torque project.
The approach of welding up the ports and studding from the bottom looked interesting until I figured out how much slop was in my Bridgeport..
At this point it looks like just sticking with the TBI is my best bet. Unless I want to cast my own injector stacks... and I no longer work in the foundry.