Spent a few hours today messing with filling the tub holes, what a pain in the a**. As you can see from the picture below, if the sheet metal wasn't fighting me, TIG welding the sheet metal in weird angles was, and then there was the green tape that I left on too long and now have to spend an hour scraping off. UGH. Turned out decently though. On the interior I just ran some seam sealer where there were any gaps. I'll be undercoating from the top of the tape residue line down, covering everything that is now exposed and cut.
Interior prepped for Al's Heat and Noise Reducer and then color matched liner. In this image you can see the driver vs passenger side; with and without panel welded in.
You may also notice two holes on the driver side and a panel welded to the floor on the passenger. The holes were to reinforce the floorboard, located underneath the crossmember which was also cut out because the seats will now be mounted to the cage. This may seem like a lot of work, but in the end, it will allow me to have an approximately 3"x15"x16" drawer underneath each of the seats, which in my opinion is worth it.
For comparison (Pulled from google search)
Full tub prepped: