'73-'76 A-body disc brake orientation.

I haven't been able to find other cars to double check, but I'd like to know the correct disc brake caliper orientation on '73-'76 A-bodies. Is the caliper suppose to be located in front of the spindle or behind it?

My car has them behind the spindle. The problem is when I order the left side (driver), I get the right side (passenger) sideand visa-versa.

Was my car changed (spindles swapped?) or are the parts store part #'s wrong (Advanced Auto Parts)?