Accually this truck is a 64.5, and the center mounted shifter like we have was used through out the 63, 64, 65, 66, 67, and 68 trucks. I just dont know the split from the wide shift arm like we have and the narrow shift arm which seems to be more common. The mechanism has 2 cables, one for the shifting, and pne for park alone I believe. I know it was a night mare to dial inn with the shifter. Has a threaded collet, and a round dial and you adjust it like a bike clutch/brake cable in a way. It just hangs out of the tranny case and points to the rear.

Kasey