Ok, ive done alot of serching and reading on this that im starting to confuse myself with info overload!
I could use some help or a couple good links.

I have a Y80 trans from a jdm B18c and a DC2 type R LSD that i want to install,
I have the trans torn down ready to install the lsd i just need some info on the following,
As you can see in the 1st pic the LSD on the right has different bearings from the stock unit which has a roller type bearings, the sealed bearings that are on the LSD wont allow it to fit into the tranny because of what looks like a cup like housing thats in it to suit the original roller bearings so my question is do i need to swap the bearings over or am i able to use the ones that are on the LSD because the "cup like housing" (red arrow 2nd pic) looks like its removable?? Obviously that same housing is on both sides of the case too to suit the roller type bearings, i thought this was worth asking before i went any further this is the first time ive cracked open a trans so some replys would really be appreciated