I have used Renthal Streetfighter and Road Low bars on my XB's without an issue. I think "magnesium" mike lowery uses Renthal Ultra Lows. We have done this on S and Ss models. I'm pretty sure the SCG uses a shorter throttle cable set, so these will likely not work on your bike if it was truly "properly converted" and they switched the throttle cables as well.
I dont recall if there is a difference between S and SCG clutch cables.