WTF Front Brakes?!?

Maybe done to expand caster/camber range? A trip to the alignment rack will answer that. I'd pull the rotors to see which wheel bearings are in there. If they're the A6 inner bearings, it's a '72 and earlier spindle. If it's an A17 bearing, it's a '73 and newer. Maybe post some forging numbers off the spindle itself. That might help, but, they're usually fairly crude and hard to read.