Hey Guys,
I've seen quite a few different ways to mount a battery in the trunk but a lot of them involved welding or drilling holes into the chassis itself so I did a little experiment to see if there was a method that was non permanent (at least the battery mounting part).
I started by cutting out a piece of plywood using the trunk carpet as a stencil.
Then I started making a box. Since I didn't have a welder I used two different methods. For one piece I cut out a piece of metal and bent it into a U shape to make the bottom and two of the sides. Then I cut out one side and created a few 90 degree brackets and riveted them to hold one side. The other side I wanted to see if it would be easier to just make another U and rivet that on.
After the box was assembled the rest was pretty easy. I drilled holes from the box into the wood, through the carpet to where I wanted to mount it. I also put a layer of foam on the bottom of the wood and countersunk screws to keep the bottom as smooth as possible.
Test fit the battery. (Note: I had to cut the wood in half to get the whole thing into the trunk.)
Put a foam sheet at the bottom of the box to protect the bottom of the battery from the hardware sticking up.
I'll probably revisit this to make the wood a little more sturdy but here is the end product. (The extra hole was from before I put the foam in, I thought I needed it to feed the wire through lol)
Not my best work putting the box together. I'll definitely re make the box to make it more aesthetically pleasing, maybe paint it.