First Drive after building, Major shake

RustyRatRod said

The Skosh chart is used as a guide for "preferred" alignment specs. It does not reflect what the factory service manual says, or the range of acceptable specs that the service manual gives. It's a good chart to use, but the alignment specs posted from the car are correct and in spec according to the factory service manual. That alignment is not the cause of the shake.

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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.