Another Newbie with a tranny question.

[dharhigh1]

Hello All! I've been reading this forum constantly and you all have been very helpful. Two weeks ago I picked up my 72 C10 LB 350/350, which I have wanted one of these forever. It has just been painted and the engine rebuilt, it has plenty of new parts all over on it and I got it for $2,775.
It does have some small things I am dealing with mainly electrical like the gages etc. Also the rear seal is leaking in the transmission (Turbo 350) and I have a carrier bearing midway, any tips that you can offer on changing this rear seal out. I have already bought it so I just need to do the dirty work.
Thanks in advance,
Dan