Yeah. 8bs is a good size for longer runs to fuel pumps. And even up to 6bs if running multiple laege pumps. With low voltage DC wiring, you have to consider volt drop aswell as current carrying capacity. 12awg would handle the current all day long, but 12awg on a longer cable run and you will be introducing a measureable amount of volt drop. Lower voltage (from volt drop) reduces the performance of the pump. A pump that us running at say 12-13v will pump less volume than the same pump pumping at 14.4v.

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Doing it for all the wagons out there