Steering Box Difference '72-'73

the difference in the boxes is the spline size where the pitman arm attaches.

they changed in 73....they are largers...

now the second part....in 73 the A bodies got the larger brakes from the E/B bodies....they also changed the drag link.....

the new drag link in 73 takes the pittman arm and idler arm in the opposite direction then the 73 and older...