Instability Question

Ok forum friends, now I think we are getting somewhere on this problem I am having with Mean Green. I researched "Bump Steer" like Green1 suggested. While I was looking the Duster over yesterday, checking all the components for looseness, I didn't find any looseness. I did notice that when jacking the car under the K member in the center the left front wheel developes a severe toe in which would cause the condition I am experiencing. Bump Steer.
I just changed over to BBP last fall, {73-76} parts on this 71. The lower balljoint arm is configured a little differently than the one I took off. Is it possible this difference has changed the dynamics at the outer tie rod enough to cause the toe-in to cause the Bump-Steer condition. I never had this problem to this extreme until I changed over to BBP. The definition of Bump Steer as described in my research pretty much nails it.
If this is the problem, how do I correct it? Thanks friends, with your help I'll get this solved yet and it'll be safe to drive soon!:read2: