I was thinking about these.
Would they fit an '86?
Stock OEM Porsche Turbo Twist wheels (not aftermarket) with tires mounted.
Front set are 17" X 7", 55mm offset, 130mm bolt pattern
Rear set are 17" X 8.5", 50mm offset, 130mm bolt pattern
Porsche center caps are included

 

They will fit, however, I would upgrade to 18s if I wanted twists. They have more tires to choose from and they are wider, which the car can handle.