Would This Make Sense?

Makes me wonder if he used early b-body springs that are an inch longer and would move the rear back an inch. Just a thought. I accidentally put an a-body spring on the right side of a 64 Fury, a B-body, that has a broken main leaf on the right side and used it for a while wondering why the driveshaft was different. It worked but bound up every now and then. The opposite could have happened here.