[Gav]

My car has differing patterns front to rear, and since the offsets and size are totally different it really hasn't been an issue.
The race wheels I have on mine have a GM stud pattern and I just had a couple of conversion hats made for the rear. They are only 1/2" thick and are no issue.

There are bigger issues, like whether you should fit a blower or not. That is what I'd be spending my time and money on!