As Klaus indicated, this is a reasonably simple job.

I was able to remove one of the two bolts on left side (facing dash) of the bolster (yellow airbag label on it), so I pushed the right side down to gain some access. The main problem I encountered was the black Z-shaped bracket on right side (which the bolster attaches to) ... it's very difficult to access the hex mounting bolts which hold this bracket on, so I left it in place. This made it somewhat difficult to remove the motor & wheel. I was then concerned that the wheel of the new unit might get bent upon installation because of this limited clearance, and thereby throw the wheel out of balance. All is well, however. Finally, heat again!

Thanks again Klaus.
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1998 S70 T5, 5-speed manual, 217000 miles