Saab: 9000 Gearbox questions

Hi,

i finally got another transmission for my 9000T and now i have it on
the bench and im cleaning it, already used 2 cans of brake cleaner to
just get the clutch housing to expose some metal instead of the black
gunk so i have 3 questions now, first is, the gearbox in my car
right now is of the old style (-93) but it has the newer gear selector
joint (the round one), seems that the previous owner put on the newer
one when he replaced the gearbox. but the gearbox i have now has the
old style rubber block thing, can i exchange that? i mean can i use
the newer round joint on this gearbox? second thing, the gearbox just
has this drive shaft "bell" on one side, on the other side there is
just a shaft sticking out, is there one "bell" missing maybe, if yes,
can i use the ones from my old gearbox? third : after washing down the
clutch housing with brake cleaner i noticed some very very slight
crunching noise at the bearing on the shaft where the clutch goes
(input shaft?) i think i might have washed some dirt inside there, is
there some easy way to take that bearing out, or should i just put
some grease in there and leave it taht way? also should i replace that
rubber o ring that is on that bearing, it looks a bit tired but maybe
its not that important anyways? im happy for all hints, any other
useful tips for the gearbox job, YES i WILL replace pilot, throwout
bearing, inner and outer driveshaft boots and the clutch slave
cylinder + complete clutch assembly, i dont really want to touch the
crankshaft seal as i hear its awful to do.

bye

simon