It would seem to me if this type of knob was OEM there would be a lot of old worn ones out there sitting at the end of a shift stick.
Or maybe it was an option which was available at the time over the counter in the chevy parts dept., but not many were ever sold.
The other thought could be the guy on ebay found a repo knob which fits the shift stick and sold it. Maybe he found it in a garage sale and someone told him it fit a chevy truck.
Any which way it will look good in your truck.
Dan
