Yes they can physically swap, but the metering won't be right. I have seen universal 4150 conversion kits. Those don't make sense. The 1850 and the 3310 have different idle feed restrictions. Also, the PVCR restrictions are different.
You are better off getting a 3310-1 secondary metering plate. It is pretty close. I see them on Ebay frequently. You can get a core 3310-1 for $25 or less.