Help ID'ing these Buick hubs

[Wogden]

Here are two Buick hubs circa '58+ I would like someone with more experience than I to look at and ID for me. I was under the impression that all the 58-63 hubs were the same but these are not. They do take the same roller bearings but the one on the right is 1/4 inch longer and has a different casting. No idea what these came off as I picked them up from another builder who was under the same impression as me.

When did the Buick's go to roller bearings?

Also notice that the one hub has a larger index for the drum allowing a portion of it to protrude above the edge of the drum. I assumed that the Buick rim would then index off of that making the rim hub centric. Don't really know, just my novice opinion. The other hub shoulder sets below the drum edge as you will notice from the pic.

So, hope someone out there in "Buick world" will remember these differences and can explain or ID these for me.

Many thanks ..