If you have the offset of the wheels you want, I can plug them into an Excel spreadsheet I made up for just such an occasion. The easy way to measure offset? all you need is a ruler, some string and another pair of hands.

1. lay the wheel *face down* on the ground.
2. have someone lay a length of string across the center of the wheel and hold it tight (make sure the string lays across the *wheel* and not the *tire*, tires are on average and inch wider at the buldge and will give you an incorrect measurement).
3. measure the distance (preferrably in millimeters) from the string down to the hub mounting face (the area where the wheel touches the hub when you bolt it on the car).

This is your offset. If the measurement is greater than half the wheel width (as it is on the SVX) you have *positive* offset. If it is less than that, you have *negative* offset.