wondering what it takes to get 5/6 drop.

[jasonroman]

hey folks, question from a newbie. i know i will be told to search or not get reply. but id like to lower my new truck. 71 c10. v6. i looked at some kits but dont see 5/6 drops. mostley 3/4 with springs/blocks/spinle or shock. mainly id like to know if ill need to have the frame knotched? i was hoping not. only because i dont have lots to spend on the extra knotch. any help would be great. thanks,
and if you folks wouldnt mind posting a couple shots of trucks at different drop hights, that would be better than great.