I canít remember if there are any particular tips on replacing the blower motor.
As far as the bleeder base spinning in the housing, itís just a matter of time before it blows. Usually it gives some warning by seeping coolant and leaving dried coolant residue on the housing (wouldnít be surprised if youíre already seeing that). If you replace it, donít use the aftermarket (Dorman or any other brand).
You should buy the OEM housing and metal pipe. That later design has the bleeder valve seat welded into the metal pipe rather than molded into the plastic housing.
To replace the housing you have to remove or loosen the bolts and raise the plenum. My advice is to remove the plenum, clean dirt and grit from the top of the lower intake and underside of the plenum, and replace the plenum gaskets (inexpensive - use OEM or Felpro). If you just raise the plenum, you risk the inevitably accumulated dirt and grit slipping over into the gasket area and leaking air - then youíve got to do it all over again with full removal.
Sorry to lay all that on you, but my advice is either do it right or donít put the effort into it and still have problems. Itís not all that bad to do, but itís not a trivial task.
'98 LXi - Later Concorde gages (black w/ chrome rings)/'99 LX - LHS gages (white) - HIR bulbs