https://imgur.com/IjZJnV1

https://imgur.com/XYWfbJg

https://imgur.com/kfLNYJm

https://imgur.com/UJVH4qi

These are the relevant pages from my 81 parts book.

I dont identify the one you are talking about, i know what you mean though, i took one from a later 90s truck and used it on my 81(but the battery is swapped to the other side of the engine bay, and i cut it up) i took mine from a 2wd gas truck. The washer mount is the same for all