It should be way up on the firewall , behind the booster section..that is why I mention full hood ..
Just look for a 3 wire connector with those colored wires.................. those wires all go down to the blower compartment.
Which is why we use that connector before pulling everything apart. [ X/64 connector]

If you can't find it on that chassis , I will look it up in the Location Pictorals

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A Dalton