I can answer your first question: a mock up was made to fit the space. The Tank resembles the original in shape, but should have an ever so slightly larger capacity. We didn't do the math to calculate what the capacity will be, but I believe it will be larger than 12 US gallons, I'm hoping 14. It is a complete cell, all aluminum that fits the original location. Whether the Gauge will work I guess depends on the sending unit and I'm not sure what Ron has done with that. I'll let you know. It is all going together now.
Gus