That would absolutely be my preference as well. That space above it is hard to do much withHi, Curious Campervans,
Building out an Extended, and we want to use the 24" behind the wheel-well to put a 36" wide x 24" deep shower. Your 22-gallon tank leaves room for that because it doesn't extend past the wheel well. But your proposed bigger tank extends past the wheel well. Both tanks are well-below counter height and well below what I think most people do for gear garages. Why not make the 36-gallon tank be horizontally the same dimensions as the 22-gallon, but taller?