200 is a good deal for an 89. If all it needs is a head gasket then it would be worth fixing. If it is a higher mileage car then you will definately need a new x-over pipe for the car. You can order the x-over pipe from a guy that specializes in Turbo Grand Prixs. If you get the x-over pipe, you can also get a chip from him that is capable of dropping the car into the 14's. The chip and pipe are like 900 I think. Worse comes to worse, you part the car out. You can easily make more than 200 off parts. Go here for some info
www.w-body.com.