LCA - addenedum?

[oldeskewltoy]

I've checked out many of the LCA posts... http://www.toymods.org.au/forums/sea...archid=1364177


Here is what I found on a recent E7 toyodiy.com search



48068 LOWER ARM SUB-ASSY, FRONT SUSPENSION, RH - (from all toyodiy E7 sources Europe, Japan, USA)
this is right hand only for this discussion, left hand is similar

48068-19065 KE70E, 73E, AE70E; TYPE B
48068-19075 KE71E, AE70E, TE7*; TYPE A
48068-19085 KE71E, AE70E, TE7*; TYPE B
48068-19125 KE70E, 73E, AE70E; TYPE A (also AE86 - ONLY # for AE86)

48068-19135 AE71E; TYPE B (1983 USA only)
48068-19145 AE71E; TYPE A (1983 USA only)

type "A", or type "B" is the ball joint type, they supeceed back and forth

So, what makes the 1983 USA lower control arm a one year only part????