Thanks Jim!
More work on the seat back bracket... Trimming the side pieces to match the wheel well...
Adding welding flange, hammered out of 16 gauge steel..
Test drive....
https://www.youtube.com/watch?v=mpFl01yHvKw
Used the Roper Whitney hand punch to make our plug weld holes..
Next we'll close off the back area to contain the amp and bass speaker.