Jim....check out this link on our website:
http://www.vanpeltsales.com/FH_web/f...ervicetips.htm
This explains the fans used in your truck. Technically, it's not the 8BA (passenger car fan). You should have the 21A oil filled type fan.
Repair parts have become scarce this past year. I do have the impeller & shaft, but not the spindle bearing by itself. I recently found some of the complete hub & sheave assemblies with new internal parts. Check with our sales office this week and we can let you know what we have.