You can also run the HD S.E. Pro Big Bore Manifold. Part # 29635-99 it will take your 45 mikuni without using an adapter. price is $59.96 at Chicago Harley.
Your input is appreciated. I came to the same conclusion as to not using the adapter.The best solution, IMo is the Hd manifold becasue the carb can be mounted without an adapter that pushes to carb 1/4" more into your leg.
As always, JMHO,
Bob