I have a pair of 45MM Weber throttlebodies that look like 44MM IDF carbs. These have injector mounts and fuel rails. One also has a mounting position for the TPS sensor. I am making manifolds to fit these to a 140 engine.
The entire assembly will be available and will include the throttlebodies, manifolds, air filters and linkage.
I'll post some pics soon.
45MM Throttlebodies, same bolt pattern as the 40 and 44 IDF's.