PowerStone did work with chankast. I didn't have a powerful enough system to really run it, but it was close. I would bet a 3.4ghz+ might be able to run it full speed.
Also, a dreamcast in a cab is a good thing. And pretty easy to do. Depending on how your CRT is setup, you might be able to get a good swappable solution (like PC and dreamcast both jamma connections. Sure not super easy to do, but very very doable.