rear static drop questions

[capriceguy]

Hi there. I recently bought a stock 83 C10 2wd stepside with 350/4spd. I just scored a set of 2" lowering springs for the front from my neighbor. They were just taking up space in his garage so he gave them to me. My question is: I have read/ seen pictures that show a 4" drop in the rear looks good with 2" front drop on these trucks, and is accomplished with a different shackle on the rear leaf springs. Is there a lower shackle that will work that is available oem? Is there an alternative to buying the overpriced stuff from the aftermarket? I am basically a cheap/do it yourself guy and am looking to spend as little as possible here. Any help is greatly appeciated. Thanks!