i just got my stock 56" rears from jcwhitney and i need to order up the new poly greasable bushings and a zero rate for it ... right now i have the ord 4" shackle flip on my k5... i need to match the front suspnsion which is about 7-8" lift ... so i have 5" it least right their .. how can i make up for the rest of the lift? i think i want the ord 6" shackles and how much lift would that get me? also i read somewhere on here that i can flip teh overload upside down and get a little more lift i need help asap as i need to get my truck ready by thanksgiving