The Toyota supercharger will work, but not the ones we get in the states. The SC12 that we have here is only 1200cc and it is made for a 1.5 liter. The ones in Japan are a SC14 and are 1400cc, this doens't sound like a huge difference, but it definatly is. I was able to get a SC14 from a junkyard in Japan. I can squeeze 10.5 psi on a good day on my car with the SC14, and usually about 9.5.
I know that you said that you want to use a Toyota motor, but for others out there, there are a few other things to consider when installing one of these on a Volvo motor.
1. The charger comes with a serpentine pulley, the B230's use V belts.
2. Where are you gonna mount it? On my car, it wouldnt fit on the drivers side of the motor. The steering rack, brake master, and power steering pump are in the way. I mounted mine on the passengers side above the exh manifold. If you use a 16v head then there isnt enough room between the head and the inner fender.