After due diligence I have not found anyone who has done this. I am fairly sure it is possible, but I would prefer some reassurance before I parlay the funds for the new frames. Also, if I do swap the frames, is it going to cause me a headache once I get to the range? I don't see anything in the SASS handbook saying it is prohibited, but again I would rather ask beforehand.
And as for why, I just like the way the SBH frames feel. After hunting with Dragoons/Walkers, I have grown accustomed to that style frame.