If you have the know how, you can rebuild it yourself. If not, your looking at about 150.00 to 200.00 with parts and labor for the rebuild. You can get away with some 42 pound injectors and mass air meter, just make sure you get it calibrated for blowthrough applicatons. other than a wastegate which you can buy some bullshit one for less than 100.00 sometimes, but be careful, you get what you pay for. And you can build your own manual boost controller. BOV, those are dependant but you can get a Bosch one pretty cheap out of a boneyard probably for 5.00. Anyways, good luck on your endeavour, and hope it suits what your looking for.
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Ryan
1990 Mustang GT (In Process)
1993 LX Coupe (Daily Driver, but just choose not to)
2005 Excursion (Big Pig)