Personally never been a fan of duallies.... but this rig just looks too cool.
Are you going to go with a rear, centered fuel fill point?
That is one of my goals with my rig is why I asked, and I see your tank is set up for that.
(one thing that chaps my azz is having to wait in line for a fuel pump because my fill point is on the drivers side of my Sonoma....grrrrrr)