tartuffe,these are a few shots of my tanks. they rest on to of the bulkheads between the cap & the bulkheads. i was limited by the rod box openings, but with the cap off, you could add some more pipe.

this is a shot of the end of the tank (pvc pipe) the smaller pipe sticking up is the fill tube
port side
this is a shot of the starboard side
this is a shot of the pump in the bilge