Here is a thread worth revisiting. Its a bit embarrassing as dirty and unattended things were in these pics but it was an 84 xl I had and I was quite green around the ears at the time. But go look at what's involved in pulling the left hand blower motor for the dash on an xl and xlv from inside. What I pictured did not even include a step slide or a finished floor or the dash extension that petroudes out like cc and some other converters added.
THERE IS A BETTER WAY.
Now go outside.
Go to the front of the bus. U will be looking at a rectangular piece of stainless centered under the windshields with a few ribs going across the bottom. If u simply remove the rivits up the 2 sides and across the bottom u can then quite easily pull it away far enough to be looking right at that motor and within fingers reach.
This takes days of work and turns it into hours.