Swapping from drum to disc....Tie rod adjustments!

Every time that I change from front drum brakes to the 1973 and later discs, I have to spin the tie rod sleeves numerous times to get the toe setting in spec.
This has been the case on every '64-72 Dart, Valiant and Duster that I have worked on.
Looking at the lower ball joint where the steering arm connects to the outer tie rod, the steering arm on disc brake cars has more offset away from the wheel than the drum brake cars did. The 73-76 A body used the traditional B body lower ball joints but the B body used the same ball joints whether they were drum or disc, right?
I just wonder why they chose to use the same part since it appears that the disc LBJs would have an effect on bump steer since they effectively make the tie rod assemblies shorter.
I'm sure I am not the first to notice this. I did a disc swap over the weekend in a '65 Valiant and as usual, when it was assembled with untouched tie rod assemblies, the toe IN was dramatic until I clocked the tie rod sleeves a BUNCH.
Comments ?