Chiefrocka,
This is the shifter I was sold. As you can see, the shift arms bolt on to the transmission shaft.
On my truck, the transmission shafts are splined, and the shift arms slip over them and clamp down (see pix above).
And another question while I've got the pros around: the truck has always jumped out of 3rd gear. I'm told it's a synchronizer. Should I repair the transmission or replace it?