What offset 17*11

[aftermath]

Dedicated track car, broadfoot widebody, 87 turbo spindles, Lindsey big brake upgrade. I have no idea on what offset fits the front or rear as I just changed from 86 to 87 spindles and was running 17*9 et 47 before. I have several spacers I can run in the rear so figuring out what works in the front is more important. I do want a square setup so I can rotate tires and have fewer spares. Recommendations?