The CW coded trannys were very similar to the CX and CY coded units that came before in 68-69....HD internals, special governor, 6 lug converter, and so on...these trannys are really something to experience. You put the car in drive...mash the pedal and it upshifts at around 6200-6300 rpm on it's own
This worked real well with high revving solid lifter engines. Your car should have a CW coded tranny...
wilma