Changed the blower in my 91.
I am eternally grateful to Art Benstein at cleanframetrap.com. His pictorials along with decriptions were absolutely essential for an successful job. Not sure if I would have attempted it without it directions. Art, thanks again.

11 1/2hrs start to finish. Doing everything right along the way. Cleaning, adjusting, lubing. Didn't break a part. Removed the passenger seat only and recommend removing both as it is a long day. Left the dash in. Did not remove the heater vac lines. Left them intact and worked comfortably around them. Everything as per Arts direction. Everything on my car was torx except for 2 philips holding down my heater valve cable on the console. All else were Torx, even the motor mounting screws.

Challanges a plenty 1)Getting the driver side clam shell inner and outer off. Lots of wires and column framework to hinder you. 2)I left the drivers side and lwr vent cowling in. just push it aside. To difficult to get out, but had to remove centre and side vents to allow for wiggle room. 3)the rear floor vents are perfect to eat up the clips that hold the fans on. Stuff rags down them. Trust me! 4)The little vac diaphragms at the vents are fragile. Take care pulling the hoses off, as well as the rubber nibs holding the main venting on just below the defrost vent. Be gentle!. 5)Fan clips were tricky till i figured out you just need to pull up one edge and slip it off. Actually easy. 6)Be real careful mounting the motor. The screws will fall off and wedge between the housing and the heater core. Very challenging to get them out if they fall. stuff a rag in there too. 7) Toughtest test for me was mounting the ground wire in its original place. Behind the white vac accumulator, tied up real snug. Made myself a little torx tool with a torx bit and a minature wrench and it worked.
Patience and taking care was key. Amazing how better the new seimans works. Never realized how poorly the old one was. Sore body, warm car :-)
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91 Brick turning 400,000 this month