Front sway bar fit

If you want to put the 72 bar on a 73 you have to swap the spindles from one side to the other and move the brake calipers to the rear of the spindle.. Or it won't steer.

The same has to be done when adding the 73 brakes to a 72 340 car with the early bar. If you don't put the brakes to the rear of the spindle. the calipers will hit the wider 72 bar.