When we got the 80 240D a year and 1/2 ago, the blower did not work. would not turn by hand when removed. I installed one from another 123, don`t remember what year I got the replacement from. but From what I have seen in the junk yard, they all look the same, or at least all seem to fit in the same hole of the heater box.
they have 3 socket head bolts and one phillips screw and the plug, then it just drops out.
BRICKTRON, you do not have to remove the dash to R&R the blower assembly.
when ever I see what looks like a good one, I check it out with my DeWalt 14 volt drill battery to see if they spin up. If they do, it`s mine.
Charlie