Longer leaf springs and shackle flip questions

[woodwright]

I have a 70 K10 and am trying to get all my ducks in a row. I have read a few times about longer leaf springs, and shackle flips, and shackle reversals. Is there some good threads about this stuff, so I can understand it better? I want to lift my K10 4 inches or so, SUPER cheap, but I've also read that cheap lift kits ride like crap, and my stock springs are shot. Just trying to figure out which way to go. I can fab whatever I need to. I'm also throwing around building a link setup which I can buy a few rod ends here and there, and fab the rest. Thanks