July 30, 2004 11:23PM. While not as strong as a race-dedicated spool, the 31-spline Trophy Track carries a potent arsenal, including six 9310 alloy gears and twin cross-shafts, all of which are dimensionally larger and stronger than anything offered previously. 70 2wd 6 lug rear end 12 bolt Possible gear ratio's The following is a general I cut two axle flanges from a couple of short pieces of wood and then used 3/8 lag bolts to attach them to the longer center portion of the rear axle. These rearends were the Hotchkiss style, which means the ring-and-pinion gears, along with the differential components, are housed in a removable carrier, making gear changes and axle replacement quick and easy. a Custom Classic Truck" Peterson Publication; June or July 1999,