The only helpful feedback info I have received is that most of the replacement pitman arms are not machined so as to allow them to be installed onto the sector shaft as far as they need to be. Even MOOG has the issues. If the pitman arm is not onto the sector shaft all the way, the draglink will be closer to the crossmember. Here is a thread about the pitman arms.
http://67-72chevytrucks.com/vboard/s...d.php?t=804452