I don't think so. I've seen them just like this before when I was looking how to mount a compressor for my '81. Can't remember where, but I'm pretty sure it was a parts drawing online somewhere. I don't recall if I've seen one in the JY. Is the firewall a factory AC version? Curious if it could have been a dealer add on, or maybe production lines did it different vs another location?
Where's Number Dummy when you need him??
Jim
Mims, FL
'81 F100 2wd 300 Srod "Festus"
'85 F150 Supercab 4x4 351 C6 "big Whitey"
'85 F150 4x4 300 NP435 parts truck