The strange placement of the upper ends of the diagonal bracing means that the left and right brackets will have to be different. Those braces are important, they provide torsional resistance to the roof moving sideways in relation to the lower section of the car. Up front, the windshield in a small way achieves a similar function. I'm wondering if I could trim back the left side a bit like so:
I could add more welds to the brace to equal the right side...I count 7 spot welds there. If I cut and removed what is above the line, I could add welds below it.
I took a torpedo level (approx 10" long) and held it plumb with the top of it resting on the back side of the trunk/seat back panel. The bottom of the level was approximately 1 1/4" from the panel so I made a quickie cardboard mock up test bracket...
This will be attached to the trunk divider panel back side, likely welded at the side flanges.
The side flanges could be drilled and bolts with nylocks could also be used. I wouldn't want this to rattle loose not only for the safety issue but for the rattles as well.
Knowing I'd need to cut it to fit around the diagonal bracing, I got back into the trunk armed with scissors.
Right side, I'll trim the cardboard back a bit and test fit....
It is very hard to lay in a trunk, hold a flimsy piece of cardboard and get a decent picture with one hand...!
Look at the white cardboard piece. Note the distance the top is from the horizontal slot in the package tray where the belt passes through...
The seat belt sits real close to the edge of the retractor frame so maybe the brackets I'm making need more of a standoff from the trunk divider panel to get the belt in better alignment with the horizontal slot.
