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These are the two pieces you need and how it looks in an AE86.

Heater fan on the left, heater core on the right. I would be very surprised if the AE71 heater fan wasn't the same as the AE86. Although potentially the loom plug is different, which just means you would change this over too. Another photo of the actual heater fan to show the mounting points for 4AGE-86. Of course the standard ducting to the windscreen etc would need to be in place for demisting and so on.

Hope this helps someone.