A 3 rotor swap will cost a lot more than a V8 swap. Period. People that drive FCs are usually on a budget.

You can turbo a high compression motor just fine and make plenty of power. You just don't use as much boost to make the same power as a lower compression motor, and you have to use a higher octane fuel. Usually, you need to be a little more attentive to tuning.

87 N/A was 9.4:1 compression and made 146hp stock.
91 N/A was 9.7:1 compression and made 160hp stock.
87 TII was 8.5:1 compression and made 180hp stock.
91 TII was 8.7:1 (I believe) and made 200hp stock.
93 FD was 9.0:1 compression and made 255hp stock.
No, I did not have to look it up or Google it.

Turbo timers have nothing to do with preventing carbon lock. And carbon lock does not care if the motor is turbo or not. It has nothing to do with the oil flowing through the turbo.

Please keep your advice to yourself.