My 1929 model A Pickup leans lower on the drivers
That is a common problem due to the fact that the truck is usually driven with just one person and getting in and out usually causes excessive weight to be applied to the drivers side. Could be a weak leaf spring, or the leaf springs may or may not be installed properly. The front and rear cross members of the frame have a hole in the center at the top for the head of the center spring bolt to rest in. The center spring bolt is the bolt that holds all of the spring leaves together in the middle. If this bolt head is not seated in the hole properly, that can cause the body to lean. Also, the top leaf of an original leaf spring was bevelled on the front and back edges so it did not hit on the radius of the cross member. Be sure the top leaf has a radius on the edges. If you have a repo that is not bevelled, take a grinder to the edges and taper it.