[jorluivil]

I fish with double Orcas on my PA14 and also fished with double Orcas on my old Outback. On my PA14 I get a spread of approximately 15' between each line but the the gap between your lines may be more or less depending on what size rods you use and the angel/scope of the Orca

7' rod from Orca to rod tip: approx 6' X 2 = 12'
gap between Orcas on PA14: approx 3'

If you are mounting them on an Outback you will need to offset them slightly, mounting them on the exactly same spot on opposite sides will only work if you change the angle/scope of the Orca but even if you do that the butt of the rods will be in your way when you are pedaling.