Crazy alignment problems
Something looks fishy to me in the t-bar clocking, but I would appreciate if others would look and comment. Look at the position of the t-bar cam in the right LCA in the 3rd pix in post #17. With the LCA at full droop, the cam arm is almost straight out sideways and the adjuster bolt looks to be fully turned in. I wonder if this is why the OP says he has the adjusters as tight as he dares.. they are 'bottomed out' in the adjuster bars.
OP, did you keep track of the left and right side position of the t-bars? They usually are for one side or the other. And if these are the original t-bars with their lower spring rate, then the t-bar has to insert into the t-bar socket when the LCA is rotated well below the the normal full droop position. The LCA has to be something like 60-70 degrees below horizontal. You need to have the lower BJ and shock disconnected, and strut rod loose, to get it to insert right. Then you will probably have to jack up the LCA a bit to get it to where things will all go together.
This might explain why the front is moving up and down as the car rolls forward and back... part of the load is on the bushings rather than all on the t-bars.