I don't think FSM says that. I have the Dodge 1974 FSM and don't remember have read that. It should be measured by somebody on his own car.
Buddy, check two things, the frame rail and unybody aligment AND the metall bushing where the lower control arme get into the K frame. They normally can get elongated and need to be fixed there. Replacing bushing and welding a BIG washer will relocate the lower control arm on the right position into K frame.
In USA the FIRM FEEL guys makes that fix and they show some pics about that kind of job I think, on their website
a temporal solution to align back whithout try to fix the problem itself, is the offset upper control arm bushings Moog offers, to get more into positive area
I know what the ppl thinks about Dodge front ends in Venezuela
