I am replacing my leaf springs for the first time on a 73 B-body. I ordered a pair of Mopar Performance HD springs (P4452982, P4452983). I know there is supposed to be a difference with how the leafs are set up on each, but is there supposed to be a height/curve difference between the two before they're installed? When I set them eyelet to eyelet, there seems to be an inch or two difference in height where the mounting pad sits (See pictures). Just wanted to check with the veterans before I install them.