1972 Duster Build with my Daughter

HELP!!! This bolt was in the compressor bag..... I am at a loss as to where it goes... Anyone have any ideas.........
That thing is so big/long that it has to be for some steering or suspension component. That's also just about the only place you'll find a fine thread bolt/nut that large. If you forgot it someplace, you'll know where it goes soon enough!