sc14 would be fine, you would get quite a few kms just using that on your standard engine, as its not too powerful
I put a sc14 on my old 2.3L straight 6 BMW e30, went very well, idle was shit, but when driving it went hard, only made about 6psi, my e30 was just my play car really so i didnt care about the idle.
only mods i did to make it run were fuel pressure regulator and upgraded fuel pump, the bracket cost the same as the supercharger ($250 2nd hand out of a toyota previa or astina i think??) has to be perferctly plumb and align or it will just strip belts. the sc14 has an electronically activated clutch, i wired it to a switch so i could run my car with the supercharger off if i needed to.
probably not worth it at all though doing it to a suby
I bought my e30 mtech1 for $800 as a non-runner with no wof and reg on hold (it had leather interior, 5spd and full mtech body kit, looked pretty mint, fixed it myself, then spent just under $1000 getting rid of rust (did it myself) including getting the supercharger completed (did it myself) and getting a wof, and $400 on 17" mags
sold it for $4200, running algd but with a shit as idle
mint profit really, there are some old dudes out there willing to pay big bucks for mint e30s, expecially mtech ones