Hey turbojohn, I'm getting ready to do the same thing to my B King. I'm going with a stage II Velocity due to the fact that they have the jig for the different intake tube ready to go. It's a shame because I've heard only great things about Richards kits, but I'm 8 or 9 hours away and in another country. I would have to take the bike to him to get my tube made. I did speak with him and I'm going to get the Wossner rods and pistons from him. Very good guy to talk to. That seems rare in this turbo game for some reason. I'm 1 hour away from Velocity so I'll see how this one turns out. Anyhow, congrats on the new Busa, and keep us posted on the turbo build, and I'll do the same.
Thanks,
Johnny D.