Save yourself the headache and call William Baldwin at Baldwin carbs and let him build you a custom carb. The cost is more but in the end you end saving time and money. A lot of time and money.
There is also Mark Whitener at Lightning carbs. He is building the best annular boosters for 4150’s (and Dominators) you can get. His carbs also work very very well.
And Dominic at Thumper Carbs. He is also a custom carb builder that builds them one at a time. He does great work. A buddy just bought a very nice 1150 Dominator from him. That engine should be going across the dyno here soon.
Any one of those three guys will hook you up. IMO its better to spend more money up front and get a quality product than it is to save some money up from and pay through the nose at the back end.