I currently have 3inch re curved springs in the back of my 88. I want to go soa but I don't it to have too much lift. And I need to know how high it will need to be in the front to sit level or close to it. I heard soa adds 5-6.5 inches. Ideally I'd like about 6.5 inches and I really don't have the funds to buy new "stock springs"