Yeah there are other threads about this. The CV carbs need some vacuum to operate the slides properly. Todd from Hunterworks can explain it better than I can. If you were using a standard non CV carb the open air box would be a viable mod.just saw a k&n airfilter kit on ebay and it was doing away with the air filter box. I thought
the air filter box was needed for the carbs to work properly. does anyone know about this.