Over the past week or so I have ben rebuilding my front driveshaft with all new u-Joints, centering yoke and seals. So you dont have to go through the agony I did in getting part #'s I am posting what I found out.
This is specific to my 1997 Shaft however I would suspect a majority of this info is for all.
Spicer # 1310
Neapco # 1-0153
Neapco Brute Force # 1-0153BF
Rockford Driveline # K153
(1) Centering Yoke (Non-Greasable):
Spicer # 211544X
Neapco # 7-0082NG
Rockford Driveline # R2-21-1544
(1) Centering Yoke (Greasable):
Spicer # 211355X
Neapco # 7-0082
Rockford Driveline # R2-21-1355
(1) Slinger/Seal (for non-greasable yoke)
Spicer # 2-86-418
The greasable and non-Greasable centering yoke is not interchangeable without changing out the ball joint shaft. (ie.. cutting off one and welding on anther) and if you wanted to do that I would advise buying a whole new shaft and keeping the old one as a spare.