It will bolt on there, but it will not provide the full benefits of the Fireball engine.
I understand that some people may already have existing carbs, and want to make use of them. However, since the Mikuni TM32 is not an expensive carb, you could probably sell your 30mm and get most of the money needed to buy the TM32.
If you are looking to get into a Fireball and need some guidance, come on over to my Ace forum and become a member. The address is in my sig line.