Well I am thinking about making the leap to a 2jz-gte so i will need the room for piping, also with tthe spare tire well now empty, I was leaning of putting a smaller battery in there with one of these:No need for battery relocation these days, just get a lighter lithium in the stock slot and call it done in my opinion. Unless of course you are making room for piping or doing a wire tuck maybe. Those lenses look great. I love putting a towel down on the cooling panel and putting tools on it when i work under the hood, so nice.
install a nice momentary switch such as this:
Then i don't have to worry about the battery over the long winter months.