I like the idea of the tool box... takes a pretty good level of commitment though.
Here I'm thinking delete the rear seat... and you're figuring ways to put one back in. Makes me second guess removing the one I have.
I'm so on the fence on what to do back there on mine...
The thing about the B2 is having the option of having more then one passenger and enclosed storage. It was 20+ years ago, but, when I had the three across 60/40 split bench seats, I used to take 5 other people to church for total of six Thrree front and three back. They were mostly kids, but, still it was handy and not horrible for short trips. Whenever I go more then 10 or so miles from my house, I usually take a full toolbox that is worth more then what I paid for the B2. Plus, air compressor, food, water, water filter, chargers, inverters, etc. So, having a secure place to store most of it, is very important for me, both for thief and accidents.
This toolbox fits inside the job box:
Husky - 20 in. 3-Drawer Small Metal Portable Tool Box with Drawers and Tray
This Husky portable tool chest provides convenient storage & organization for your most commonly used tools. Each drawer has ball bearing slides for smooth, long-lasting operation. The top till contains
www.homedepot.com
The main reason I did not put the job box in the middle, back seat area, is because it is a hassle to get tools out of the box and getting the smaller box out itself. I installed it to almost the back of the seat, that way if I get rear ended, there is still a good chance I can get into the box if I really have to. If I had a large dog, I would make it an insulated (floor) bed area with a tie down for the dog's body harness. Most have two rings and you can use a clip for each one to evenly secure the dog..
I would caution against having anything vertical in the 2nd row area, such as a tire carrier or toolbox without special planning because in a rear end accident, many times your seats fold down flat and you end up in the back seat area. If you hit your head against a vertical surface you snap your neck.
I had a customer get rear ended, that hit the back of her Ranger so hard, regular cab, she bowed the back of the wall to the bed. The high back bucket seats saved her from more serious harm and obviously squished up. My MIL was hit so hard, she ended up flat on her back in her Explorer (?) and had broken ribs in her back area, plus, neck injuries.
Just something to think about when doing a seat delete and repurpoing it.