Hmm, ran into a situation with the 34 DATA carb I will be using sometime in the near future. It uses a water choke in exactly the same configuration as the Mikuni carb but it doesn't have a coolant barb to redirect coolant back into the plenum base of the inlet manifold, so I talked to a local machine shop about tapping a coolant barb into the side of the manifold (no biggie). As the conversation unfolded, another customer added his 2 cents worth - "why are you bothering with a water choke? They are the main issue you want to steer away from when swapping a carbie over". So I explained the deal with my carb being a water choked 34 DATA from a Lancia Beta and there not being a lot of resource info on them. "Use the electric choke from a 6 cylinder Ford carbie, it's a straight swap. And use the heater barb from a Ford too on the manifold so you can clean it all up..."
I gained some useful info, saved some cash and watched the guy behind the counter lose a customer