Re: Dirt Parts dual battery kit
The following is a copy of a response I gave on this subject to another post:
"I made my own with simple 2" angle iron, an angle grinder, and drill press. I was all set to weld a tray up when I noted that the factory "secondary" tray (like you have on your 2010) has a number of threaded holes for both M6 and M8 bolts. Easy to bolt angle iron to!
The fabrication was simply a matter of unbolting the Power steering reservoir, cutting off the bottom half of its bracket, drilling two holes in the bracket and then mounting the bracket to the angle iron.
From there I built and bolted down the remaining three sides of the "tray". You will have to drill a few remaining holes for a couple of the sides, but you can get a nut on the bottom side of the tray with a little finessing
Lastly, I put down some rubber stair tread material to line the inside of the "tray' and after rearranging the AC bracket, called it good.
The hold-down holes are already in place for the 2010+ FJ's.
Of course you could have a tray fabbed up at a local sheetmetal shop and weld or bolt the PS bracket to it. Just make sure the inboard edge is high enough to attach the bracket."
If you use this method, you will have to do a little fiddling with the positioning of the PS reservoir height to clear the radiator hose. I had to make ~ 3/16" notch in the upper lip of the angle iron to allow the PS reservoir "wings" to fit when bolted together. It's just a matter of finding the right height and bolting or welding the bracket to the angle iron.
Hope this helps, Marc