Randy you seem like a do it once, do it right, kind of guy... so here's my recommendation for the battery tray: http://www.stainlesstrays.com/
however your big arse batteries are probably bigger than the optimas, so you may not be able to use the bottom clamps like they have, but I bet you can fab something similar. I sure like those though, what a clean way to do it..
and I envy in a 40 how you can put both batteries right next to each other, sure makes the wiring simple, nothing running across the firewall, behind the radiator, etc. like us big wagons have.
82 fj40, 99 uzj100, 06 gx470
05 525EXC, 01 XT225, 09 TTR125, 07 TTR90, 07 CRF50