WHY.....what is the NEED?
Are you hot-shotting, traveling daily long distances, working from the road etc?
I have a 35 gal tank.
Roughly 400 miles when towing my 5vr
Roughly 600 miles if not towing
I don't travel that far on any one day
How much 'room' to you have for added weight in fuel/tank?
How far do you travel at a time?
Need vs want