[Aussie Mike]

Is the inside edge of the front rim hitting on the tie rod end on the steering? This is close on a 17x8" rim with 5 1/2" back space. It'll be even closer with the smaller 15" rim.

The rear should clear. The only thing I can think of that might hit is the spring and this will depend on where your lower shock mount is located.

How about a couple of pics to show what the problem is.

Cheers