After disassembly, cleaning and a quick coat of paint, I started by fitting the new motor (NAPA part #655-1020) to the base frame.
There are two paper gaskets that surround the defroster coils--these were toast, so I made new ones from a box.
I then assembled the fan shroud and coil assembly.
After securing the fan to the motor shaft with a set screw, the motor assembly was then bolted into the car.
Job done for now.