I just wanted to wrap a few things up with this and have everything in one place.
A couple more posts and I’m done.
These are the bolts I ended up using to fasten the front end of the board down to the bed.
M6 x 120mm Stainless Bolts
They were a bit long but still not a problem. I did end up just drilling and attaching these from the back seat area. I did not remove the rear seats, just folded them down enough to get my hands underneath and line things up. I used 3 of the round spacers from the kit under the board to help keep it level and from being pushed down. I also attached the OEM tie down D rings to the corners to give me a couple tie down points, without drilling the drawer tops. With the seats up you can't even see any of the bolts or tie downs.
Next up is I wanted to protect the carpet on top of the drawers, but I didn’t want to have anything custom made so I went back to Amazon and found a few things that were pre-made , that were close in size. I originally just tried using the OEM 4runner branded carpet that came with the rig, but then it was so wide every time I tried to slide one side out or the other it was a pain.
After a bit of trial and error I settled on these. Thin rubber mouse pad like product.
Black XXL Extended Gaming Mouse Mat / Pad - Large, Wide (Long)
They had several different sizes including some oversized ones that you could cut to the exact size if you prefer. For me this was close enough
I have 2-3 more items ordered for the back to finish it all up. They are on the way, I’ll post again when they arrive and I get them installed.