If you take the turbo off of the B230FT, you will find out the hard way that the FT engine has a much lower compression than the non-turbo variety, and only produces about 80 hp without the boost. Maybe less. Ever drive one of Volvo's early 1980's diesel cars? It will be like that, possibly worse.

Edit: Upon further reflection, I believe that there are also differences in the ignition system and distributor between the Bosch and Regina cars, so you may have to swap the ignition computers too. If the wiring harness will allow it. And, if it does allow it, then you are probably going to have to swap the ECU computers too. Why not just swap the whole shebang, if the harness allows it, in the first place, and keep the turbo? Oh, yes, the turbo engines were mated with transmissions that lacked the lock-up torque converter that the N/A engines had. So, even if you swap the whole shebang, except for the tranny, you are going to be coupling the turbo engine to a lock-up torque converter that it may not like. You may be able to use the lock-up converter with a turbo, but am not sure. It is, nontheless, another difference between the cars that you have to consider.
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Scott Cook - 1991 745T, 1985 RX-7 GSL-SE, 1986 Toyota Tercel (Don't laugh, it is reliable, faithful AND gets 41 mpg!)