A late 20's/early 30's Air Maze is a flame arrestor and is "open" enough in metal screen mesh that I seriously doubt it restricts air flow or makes your car run noticeably rich to be a problem (and rich is fine as I would rather have rich then running too hot, burnt vales, or ....). Now, where I see the Air Maze being an issue is that it basically has a cap on the end when it hangs straight down and I suppose when the bolt through it is tight that if you flood the car it can build up a little puddle of gas in the lid for the air maze and that could flash fire. Everything I have had with an Air Maze (ie not Model A Fords, but such as the RR PI) have a drain in the bottom of the carburetor inlet neck to channel raw gasoline to the pavement and I would never dream of running the RRPI without the filter on as upon starting car you leaned it out and then found the magic richness - and it would shoot quite a flame.
If you run a modern paper filter on your Ford - it will restrict air flow and that is where you will need to make changes.