<VV> Front end alignment problem

[davros99 at netzero.net]

Hi all,
I've recently completed my restoration (8 years) on a 64 spyder vert and went to setup the front end caster, camber and toe.  We were using a modern rack and all was going well until the machine said I needed almost 3/4" of shim for the left camber.  We said nuts to that and put almost half of that and the damn thing said we were right on at 0.01 deg.  What gives?
But the real issue is when the caster dialed in nicely on the right coming out pretty much centered on the thrust rod threads, but the left showed us at -2 degrees.  We start to lengthen the rod and it went more negative, then toward positive but still negative but not to positive before we ran out of threads.  We raised the body, set it back down, bounced the car ... same problem.  Can't get positive caster on the left. Let alone 1-1/2 to 2 degs. Everything is new and in perfect shape.  The factory service manual says due to manufacture variances it may be necessary to place different amounts of shim on the two camber bolts to induce more caster.  Does anyone have experience with one side being way out on caster?
I also tried loosening the six bolts holding the crossmember, raising the body to let the member hang and tried to induce a shift to maybe change the situation.  The x-member is not going to relocate, won't move at all because the six bolts pretty much locate it in one and only one place.  I thought this because the books don't supply any x-member alignment procedure anyway.
Ideas?
Thanx, Patrick