The more I look at your current cockpit, the more I think 6-man could work. How short a hub can you find for your steering wheel? If not short enough, a talented fiberglass guy could cut a notch in the center dash for the steering wheel, and make it look good while keeping it strong. Don't think it would be that big a job. Move your controls to the angled part of the dash where the tab switches are, and you're good to go. Of course, moving the whole angled part forward may not cost much more than doing a notch. And, that would give all passengers much more room. Before deciding against changing the dash, price it.