The connectors should not hang down much below the crimped edge of the rocker panel. In that case I'd think that a slightly ovalized exhaust would be the ticket. Besides, when has a low exhaust or deep oil pan (w/little clearance) stopped us from tearing-up the streets?

Zippy: Looks just like mine!
May want to think about tying the connector to the seat mounts. I mean they're RIGHT THERE. All you need is an "L" shaped piece of metal. You can get that from left over connector tubing. That way the connector is more positively tied to the rocker.