you could make it turbo, you just need to find a turbo exhaust manifold for the turbo you want. then you need turbo piping, bigger injectors, and possibly a fuel management system to add more fuel to the engine under boost. also the engine would most likely have to be rebuilt to handle the turbo.
good luck
i personally think a supercharged 3.8 liter v6 in e fiero would be sweet! and that engine has a lot of potential for modifications and power.