Black tank holding pan.

[CraigCam]

I just pulled the subfloor of my 1970 overlander and removed the old black tank. Glad I did. The galvanized pan/box that holds it in place was rusted through in the bottom. Not sure why it hadn't fallen through. It was I cased in styrofoam

Where can I find a new pan and the surrounding styrofoam. The bottom styrofoam had raised baffles the tank rested on.

[CraigCam]

Here is a pic.

[HiJoeSilver]

You'll need to have a new pan made by a metal shop or by yourself. The styrofoam you can replace with some you can get at the hardware store.