It looks like a stock mopar setup to me, someone must have upgraded it with disk spindles at some point. The only question now is whether its the earlier 70-72 type or the later 73-74 type. Can't really tell from you picture if its a 1 or 2 piece rotor design. If its a two piece its definitely a 70-72 type setup, you'll have to change spindles to a 73-74 type to go with the 11.75" rotors. If its a one piece it could be either the early or later setup, you'll have to pull the brakes and check the spindle to be sure. When I redid the brakes for my '72 I found a two-piece rotor on one side and a one-piece rotor on the other
, but both had the same exact spindles and neither had any kind of spacer. There must have been a source for the 1 piece rotors awhile back, as my spindles are in fact the earlier design. I also have the pin type calipers.
