Ok I'll get the 6 prong socket and order a full rebuild for the front bearings, no matter what I'll put in new bearings and seal, may even do the needle bearing just because.
Save all the old stuff as spares.

Now for the rear outer bearings. From what my book shows is another bearing retaining nut like the front ?!?!
Google pics shows a press on ..

What's right ? Looks to be tapered roller type as well.

91 (Gen1) Monty, 3.0L V6, Auto 4 Door.
Disabled Driver.