I would not go that far :) Should work pretty good.
Lots of rotary powered gyros around using Webbers.

Nothing wrong with the webber carb. Properly jetted they are 
rock solid. That's the reason they lasted so long. The fact 
is if you don't mind somewhat poor fuel economy it will work 
fine as the racers put it, WFO. The problem with carbs on the 
rotary is that the engine has such a wide "dynamic range" that 
most of the carbs end up too rich. FI as a true demand system 
gives much better all around performance. The carb is fine though. 
If you use it, take it COMPLETELY APART, down to the last molecule 
and make sure both barrels have all the same parts. Several race 
engines I tuned had mismatched parts from the factory. The worst 
was a 40 DCOE that had two different primary venturi diameters! 
One 38mm and one 40mm! This was a brand spanking new carb still 
in the shipping box. Must have been a friday afternoon part. Bill Jepson