I may buy a Supra, need some help!!

My freind just offered me his '87 non-turbo supra. My question is, can i just find a turbo and all hardware off of a junked turbo or is the inline 6 differnt enough so that isnt possible. If that doesnt work I will just look for a longblock out of a turbo JZA70 to drop in there. And info on what i will need with the engine (ECU, etc.) to make it work. Also how far can the JZA70 go in term of power??

Dont buy it, save your money and get a 2nd gen rx7, or if you have the money get a 3rd gen;), the can be made faster easier.