Replace Black Tank on SS Rocket

[mrcjdunne]

After many hours replacing the black water dump valve on my '69 SS Rocket it seems now like the tank is leaking.
After installing the valve, I poured some water in the tank. It started leaking from behind the flange that the Thetford valve attaches to. It was a pretty big leak.

So now I'm thinking I need to replace the tank.

Does anyone have experience doing this?

Thanks,

Chris