if i remember back to the day i put a new set in the 1000 there was a big chisel involved in detroying the bearing collars as there is nowhere to press against to get these off, may be different with 1200 stuff but i had to get new collars.
pretty sure they either came with the bearing kit or i got them from nissan easily

i think i may have got the kit all from nissan as it was cheaper then from a bearing shop.
either way they both will have them as they fit many cars.

if you have a welder then run a bead of weld on two sides of the collar and press off the weld. will save the chisel and therefore the swearing but will destroy the collars.
have done this many times on fwd pulsar diff bearings with 100% success.


ben

http://autos.groups.yahoo.com/group/datsunb10/