First Drive after building, Major shake

inertia said
As I mentioned, the print-out wasn't what I expected, and, it isn't right either, but it's better than the (neg) - 1* to 0* caster - the Factory Service Manual spec for late 60 to mid 70's A-body manual steering cars.
I agree it's not the issue at + 1* caster.
Neg caster has little, if any directional stability, hence my concern re. "shopping cart wobble" at FSM spec with neg caster.
I maintain the more POS caster, the better the directional stability.

The shopping cart reference was a real good one......we call um buggies down here, but anybody would understand what you mean. The only thing I see that would really negate any of that to me......and I could be way wrong.......would be the steering linkage. As long as everything is in good shape with no extra slop, I think that would keep any buggy wobble, lol, at bay.

I could be wrong, it's happened a time or million before. lol