Chris,
Yes, The Limo EZ is 2" deeper at the side and maybe a little more do the the curvature in the floor. As far as fuel systems there are a lot of opinions out there but you have to balance safety with pilot work load. I am using a fuel injected engine that rquires returning fuel to the tank. This would require a lot of lines in the cabin. I made a gallon sump that bridges the two tanks via large openings no metal lines. It feeds out the back through the firewall. I have yet to fly so take this info at your own risk.
Joe Berki