Finalized all the measurements and got the 2x8 that will ride across the perimeter of the roof attached to the ribs.
A buddy came by to review the dam. He has an aluminum brake and will bend up the bottom and side panels along with the corner strips.
I'm trying to keep the weight down so the interior 1/2" plywood will be installed after the air dam is mounted. Essentially only the bare minimum frame will have to get dragged up the roof for mounting.
Sure would be nice to own some scaffolding...