All the touring bikes, Electra-glide, Street-glide, Road Glide, Road King and such handle bar mounts are in the same location as far as in relation to the steering neck.
On my last CVO Road Glide I had Paul Yaffe monkey bars, 14". On my Current CVO King I have Monkey bars also 14". Really like the Yaffe bars, however after 6 months of they will be ready next month for my 15 CVO Road Glide I went with Factory 47. They are very well built, thicker than the Yaffe bars too. I went with 14". My finding is they are a bit short, 13" is more like it. Yaffe run tall, they are 15" in.
I am very happy with the factory 47, I would order 16" next time. However with the 14 you can use the factory clutch and break line, with 16 they would have to be replaced.
Here are 14" Factory 47.