I am rebuilding my 1959 Ford truck 292 and down to the carburetor.  Looking at the 2bbl and the plenum inlets of the intake, it looks to me like there would not be a good fuel/air passage.  The intake plenum is larger and I would think a designed spacer with tapered ports should be used.  Maybe I am over thinking this but in my past life nozzles did not have sharp turns and flat surfaces to obstruct the gas passage.  A diverging gas passage would seem to be correct.