My '35 chevy is the same way. Unfortunately most suspension designs don't have the a-arms and the tie rods traveling on the same arc. Most suspensions develop negative camber as they reach thier limit of travel. Especially cars designed with limited travel. Trucks designed with a lot of travel aren't so bad. Toe out is a result of negative camber. As the wheels pull in a the top, the arc that the tie rods travel don't allow them to pull in at the same rate as the upper a-frame so the tires get pushed out at the front by the tie rods causing toe out. They even named a car club after it "Negative Camber".