I had issues today lowering my 70'

[70c10]

I installed a set of 4" rear springs and opened the box and noticed one spring was about 1/2" taller. What side is supposed to get the taller spring?. I think have installed the taller spring on the passenger side. The second part of my problem is I cut my front springs equally and the passenger side sits higher. My buddy said this will "seat" itself when I drive it. The passenger side front and rear sit about 3/4" or so higher. The truck looks funny!.Will the passenger side of the truck sit level after that spring seats itself????. I plan to drive it over some bumps after I get my dash back together