I started building the dual battery tray today. I used the existing tray and just added to it. I used the bed frame idea for metal. I also try to recycle as much of the old tray as possible which worked out real nice. I cut up the firewall straps and rewelded them with some spacers at the top to make up for the width.
Then I cut the fuse & relay block holder in two places. Then I welded the relay block holder back on the new tray .
Then welded the main wire harness support loops back to the side of the tray. The scrap from between the two I used to make a switch mount for the 1000amp battery cut offs.
While the paint dries and until the power distribution block arrives I'll contemplate the battery hold down. I took a few hours but I did a lot of bead welding instead of just spot. And because my welding has something to be desired it took alot of grinding too. Its strong thou. Before I painted it I stood on it in the jeep and I weight 200lbs.
I'll post up more pics as I progress.