on my '71 Demon I'm going to try using the Knuckles/Arms (the Lower Ball Joint / Steering Arm assembly) from a 1970's D100.
from a comparison of the arms on my '72 D100 parts truck, and the arms on my Demon, they appear to be identical, except the trucks are "front steer" (the draglink would be in front of the hubs, instead of behind it like on an A-body)