im pretty sure vf turbos can not be rebuilt.
converting your NA suby to a forced induction suby is a terrible idea. it is a **** ton of work, and a **** ton of money. you are 1000x better off just selling it and buying a wrx or sti and building from that platform.
putting that turbo on your na suby is only 1 out of like 100 parts your going to need
unless you know exactly what neeeds to be done to turn your impreza into a turbo impreza, and by exactly i mean every part, the work it entails, and where you will source all these parts, and a ballpark # of $ of what your doing, then no. this is possibly the worst thing you could do to your car.
If you knew what was involve, and had the tools and experience to do it, then you wouldnt have to ask. Just having you have to ask, makes me think you are so far in over your head all i can do is laugh
heres a rough list of parts that come to mind (be warned, there are a LOT, i am misssing)
new exhaust manifold
new up pipe
all silicone couplers and t clamps
possible new intake manifold, depening if its shaped the same as the turbo
correct ECU an associated wiring
some sort of boost control
DBW or DBcable makes another huge hurdle jump over
this is a very short list, and i am sure there is a lot i am missing, not to mention the labor involved.
you cant just "throw a turbo on" and have it work.... theres a LOT more to it than that