could maybe talk to Jungle Jim on ramchargecentral.com. he builds bracket and shackles that would lift your truck but allow you to keep your stock leaf spings which are already broke in and should not sag and more.
Dodge front spring drop hangers with shackles. prices range in the $310-$340 depending on how much lift you get
Dodge rear spring shackle flip hangers $315.14
now in the future if you would like you could also buy lift springs like you could and lift it even more. i think with the parts i suggested you will get about 4 3/4" lift.
now if you have any question about the parts i highly recommend you contact Jim. he is a good guy and i have seen his stuff installed on some very nice lifted diesel rams.