OK, my front blower stopped working (I have an 84).  It is not the switch
(darn it!) so I assume that it must be the blower.  I looked in the
bentley and it seems I have to disassemble the whole heating unit to get
at the blower.  So, my questions for those who have done it:

1.  Is this correct, do I need to take apart the dash and dig into the
heating unit to get at the motor.  If so, what is involved (some sort of
general idea would help me a lot).  How much time could I be looking at?

2.  While in there, should I replace anything else (like perhaps the
heater core - is it worth replacing for fear it might fail later?)

3.  Any other ideas/hints?

Thanks a ton in advance!
Blake
84 Westy
St Louis MO