Hi bowtiejoe . . .
A wall ornament is last thing I would choose. This stuff was meant to be installed and driven! The important thing is two identical carburetors. The metering rods won't likely need to be changed because the air flow will effectively be cut in half as it is now flowing through the two equally sized venturi - so the fuel drawn from each will be halved.
You should be prepared to tinker and tune to get a dual setup to behave. Synchronization is important:
Dual One Barrels and using carbs from a smaller engine (lower CFM rating) is also typically recommended. But you are fitting to a 207 so I am not sure that there are any Carter OEM carbs out there from a smaller engine.
Also, dual carbs are typically fitted in conjunction with a compression ratio increase and extended cam duration. Absent these changes the increased carburetor capacity is likely to reduce fuel efficiency with only modest improvement in performance.
With the parts in hand I would build it.
regards,
stock49
