Bghouse, I would go agm anyway. Ford makes a bracket for putting a battery underneath. Or so I've read. I had a welder make a bracket to mount a second battery underneath the Trail Lite B Plus we had. When it's hard to get to like that, an agm is essential. Run big enough cables between the two. Both should be matching agm.
We have a 600 watt inverter with our two battery system. I mounted it in the kitchen cabinet, within 3 feet of my batteries. I'm sure you can find a place. Ask on the tech forum for help when the time comes. The farther from the batteries, the larger the cable, basically.
No, I don't have the same model as you are looking at. But it's the same size and has the same stuff on top.
