71 Dart Leaf Spring Help

I'm just installing my fourth set of springs from ESPO on Darts from 1970 to 73. High quality product that has never disappointed me. I also ordered mine with an inch or two of extra curve. All the leaf springs settle down after a couple years so unless you want to do this again, I think it's a good idea. Be sure to order the 6 leaf spring for a 340 car!