Pigman, Your alignment guy knows what he's doing, which is a good thing.
Chilton's (1970) Factory spec for a '66 or '67 Valiant ride height is 2" plus or minus 1/8"
but my '67 Plymouth Shop book says 2 1/8" plus minus 1/8", so Chilton's could be wrong on the '66 hieght too. Either 2" or 2 1/8 is in spec, so you culd give him that as the range.
In the middle of the the thread Poisondart linked to are pictures showing where to measure from.
Factory caster should be 3/4 deg positive (1/4 to 1 1/4 acceptable but make both sides the same) If you are running radial tires and power steering, the maximum caster is generally better for cornering grip. Even with Manual steering 1 1/4 isn't going to be that much harder to drive, although for the record, the factory recommended 1 degree negative to 0 degrees caster on manual steering cars.
Factory camber was 1/2 degree positive left side, 1/4 degree positive right side. This difference was because of the high crown on most roads. Feel free to make them the same, and even to go 1/4 degree negative especially if using radial tires and you want a little more initial bite on turn in.
Factory Toe was 1/8" in, plus minus 1/32"
