I like to think that I am pretty knowledgeable with older Fords having sold Big Ford trucks back in the 80 and being around them my whole life.I am restoring a sweet 79 swb 150 4x4 with Explorer trim. I noticed this bolted to the back cab wall and never thought a out it until stripping out the interior for paint. What is this? I was thinking it might be to sit the jack on, on soft soil but honestly, Im stumped. Your i put is greatly appreciated! Thanks

 

Resonance weight

(phone app link)

 

What’s it for?

 

Stopping the cab from resonating under very specific & rare conditions.

 

A lot of vehicles have them.