Here's a couple pics of my vent. The vent's arms connect to the pivoting arms which their base is welded to the cowl. Hopefully the pics help. Please note that the pivoting points are I believe riveted, yet one of mine has a bolt and nut. This is from the rivet breaking and so I simply drilled out the broken rivet and grabbed an extra bolt and nut.
Perfect, that is just what I needed. Now I have to fabricate a piece and rig something up to make it work. I'll have to drill out the rivet and make a L bracket for one side of the base.
Thanks!