WTF Front Brakes?!?

I have the same calipers on my 72' Dodge B300 Van. Missing are the spring clips or maybe called, anti-rattle clips for the mounting bolts.

They may look the same, ie, pin type, but I’m pretty sure the calipers would be the C-body version which has a few different dimensions. The piston is larger and the throw is longer as well because the rotors are thicker on the C-body/truck/van brakes