Modified the Mustang tank to fit the BA Falcon fuel pump today.
I built up the lower areas of the ribs so that I had a flat surface for the rubber o-ring to seal on.

I then used rivet nuts with the ends welded, as well as welding at the top (after riveting in place) so they didn’t leak.

Made a mistake and the outlets are facing the wrong way. Unfortunately the holes are not symetrical so its going to have to stay that way.

Also had to modify the fuel sender so that it didn’t foul on the pump module.