6 Wheel Tank Drive or Just Stait up Tank Tread?

[SaintPikachu7]

Hey, so i'm on a rookie team working on the drive train with a 6-wheel tank drive (drop center) for our robot. drive train team isn't exactly sure of an efficient way to distribute the motors power to all 6 of our wheels. any ideas? we were thinking of perhaps keeping both the CIMple boxes in the back and extending the chain to run down the entire chassis, or we were planning to buy additional sprockets to reach down the wheels at the opposite ends of the motors. Any suggestions?