[1930artdeco]

Not an expert at air cleaners for these carbs. BUT, yes you can retro fit them, HOWEVER, if you do I think that you would be best suited to add a filter that sticks up vertically since these carbs can leak fuel and soak the element (I.E. fire hazard). Also, I have heard that you need a rather large element so as not restrict the air flow. Others will chime in with more specs.

As far as changing carbs out, if this carb works for you (speed/power/MPG) then stick with it. If in the future you want more power which is good if you need it in a pinch, you can use a Marvel/Allstate (best of the A and B world) or a Model B carb-will need to enlarge the intake manifold to take full advantage of the carb.

Mike