[Ozarkguy]

Todd. Remember our conversation. The floor is not structural. Trim the flooring at the walls dig out the rot. If you can slide the new piece under do so and use adhesive, or the penetrating epoxy. The structure is the angle iron and the square tubing under the aluminum floor pan. The issue is connecting the spliced in piece. I used flat & angle pieces of metal nailing strips. Attached with countersunk screws & waterproof liquid nails. Along with the # 10 flathead self tapping metal screws. You end up with a solid floor. The coat with some sort of waterproof wood paint or sealer.

You'll be road ready before you know it.

If you need something give me a call.