Mystery bolt ID help

[Righty Tighty]

Can anyone help identify these bolts? I set them aside and forgot to label them, and I think it was during a front end rebuild on my ‘74 E body. They are 1-3/4”, 7/16 x 20.

I’m guessing whatever kit I bought came with new replacement bolts, that’s why I didn’t use these. Any help is appreciated!

 

[Murray]

7/16 ? That is a big bolt.

 

[Max1196]

Brake caliper brackets, front

 

[Righty Tighty]

That makes sense, thanks. When I rebuilt the front end, I also tore apart the brakes.