I put a FCR41 on my Duke and didn't have too many issues. The cable routing of the FCR was opposite from the Edelbrock that was on the Duke. Everything fit that Sudco sent, but it did require a little headscratching.
That carb made a HUGE difference in how the Duke ran. Much smoother, instant throttle responce and a big power gain. I'd do it again to my Adventure, if I wasn't so lazy.