The spot where the brake tee is held in place is closer tothe pumpkin on one vs the other , you may want to get the correct lines for your year and move the hole if necessary so you flex line from the body tot he rear is not over stressed should you have the wrong year housing , I had to do this when installing the later rear in a 67 barracuda convert I did some work on. The hole is 7/16 fine thread , I just red loctited a set screw into the other hole .