Looking for info on 1100 pound rear springs

[my5thmopar]

I’m going to order new rear leaf springs this week Detroit Spring has 1100 lbs with 3/2 leaf. I don’t know how these are setup. I don’t need a heavy spring or the overload. The truck has an axle flip and I’m using stock springs. I’ll call them but, thought someone has this setup and could provide a photo or explanation. I have the 1400 lbs 3/1 now but, I have removed the overload. Thanks Craig