[joyridin']

It looks like you have the very early style brake set-up. I am not sure how long they used that style, but my 2 65 set-ups both have that style.

Maybe you didn't put it in the picture, but you are missing the bracket that allows you to mount the caliper housing to the differential. You also seem to be missing the hydraulic piston assembly that bolts to each side of the caliper bracket.