you can go with the ls minime, but with 6 grand you can get some serious power, not just the na bull shit.
If i were you here is what i woud do.
Get a obd1 ls engine that is leak down tested with good compression. (1500)
Start searching for turbo parts on the fourms, and start reading on how to build sucessfull turbo kits..(buying one is over priced)
Get a used Bseries turbo manifold. (250)
Pick up a used garret t3/t4 57 trim (200-400)
Blow off valve ebay stuff works fine (25-200)
Waste gate ebay stuff fine (60-300)
Get an ebay intercooler cause the work fine for street cars (120)
get An oil feed and drain set, Stealthmode.com sells good shit cheap (95 -115)dependin on what all ya get
Tap your oil pan with provided barbed fittin useing some JB weld (4)
Buy a charge pipe kit for your car, or if you can weld, just buy som 2.5 bends, and start fabing that shit. (200 max)
Get some couplers (50 max)
Set of larger injectors, dsm 440s, precision 525 (60 -250)
Walbro 225 fuel pump (110)
exhaust with turbo down pipe (500) can be more or less.
obd1 chiped ecu cause i think the obd1 tuning options are better (150)
Obd0 to obd1 conversion harness (100)
A good street tune from a local guy (300) max
This all totals up to about 4000. All the parts i listed are priced way over what i payed and you could easily save some big money by searching carefully.
The other 2000$$, well set aside 500 or so for mounts and special shift linkage. Hasport makes good stuff
set aside another 500 for mis shit that will be needed during the swap, may end up being nothin may be ya will break a few things.
now ya have a 300 hp set up in a super light car. with 1000 to spend on other things you will want down the line, cause once you start you will want to do more.. atleast thats how it is for me.
Disclaimer fo all ya bout to go off.
There is more to a turbo kit, you will need to read a little bit and understand the principals of it, and learn a little bit about the whole process. But its not that complicated, and pm me if ya want to learn some more.