That's a difficult question to answer cause:
- Rolling fenders isn't an exact science, you could roll them mildly, or you could even push them out.
- You could as some people do here, run wide wheels with stretched tires. It gives you that "flush" look, yet only if you ignore the tires are stretched to hell.
- What's a "clean drop"?
Contact a vendor, you're probably going to have to pay extra for custom offsets, which then you may rethink your choice.