There is a belt driven super charger that looks like a turbo, but in
the true term, turbochargers are exhaust driven, and superchargers
are belt driven.
Paxton superchargers are belt driven, and look like a turbocharger, the
other style is a Roots type, like you see in drag racing, and then there
is a different style that was developed by VW called the G-ladder which
would probably be the hardest to find.
The Subaru turbo is fairly easy to find and boost is set to 8 PSI, which is
a little high for stock pistons (cast) but will work quite well.
The big question is do you have an 8V engine or a 16V engine???
I would not try to put a turbo on an 8V, there is just too much fabrication
to get it all working right, took me about 2 years of playing with different
systems and tuning to get it working well, so if you want a turbo motor, start
with a 16V engine and save yourself a lot of time and fabrication.
Bentparts has a good setup, I would start by researching what he has done
Wild