May I suggest that you pay a visit to a good spring shop, and let them build you what you want instead of trying to guess. I really like Benz Spring (www.benzspring.com) in Portland, OR, they build springs for everything from Gunderson railcars to Freightliner semis to car and truck springs, have been in biz. since the 1920's and have a great shop. They can build you custom new springs for less than you can mail order monoleafs. Look for a shop like that and they will take the stock spring specs, the weight of your truck, and your desired ride height and load capacity into consideration and make you some nice new springs. That is what I am going to do.

Paint & Body Shop moderator
A lone amateur built the Ark. A large group of professionals built the Titanic.