What do you mean wasn’t enough? That’s a decent weight, my savage x ss kit, 28 dynamite big red 3sp trans will cook to 71…thing barrels ass like a downhill truck no brakes
1 mil is a good starting point for me anyway ..the diffs can be tuned to control power bias..light fluid will allow more differential action and heavy is more like a locked diff..1 mil center, 250k rr, 115k fr