on 56's front and rear. on the front you dont have to move your rear hanger back correct? Correct
and whats the normal shackle length 6 or 7? Just get the longer shackle and if it appears to be too long then you can redrill and cut off the excess
and on the front hanger on the front springs you just reverse the stock hangers or what? Kinda sorta, check out Jekbrown's tech article on 52" spring swap.
and the rear i would need a shackle flip with 7 inch shackle? (i have echobit now i know i cant use that). You will need a shackle flip but I'm not sure what length shackle you will need. Basically you flip the brackets around and get a longer shackle
and do what with the rear springs front hanger? Don't touch it. 56s have an offset center pin so mount them with the longside to the rear and your axle will stay in the same place. If you wanted more wheelbase(4"s) you could flip the 56s around.
trying to piece all of this together. how much lift did people get out of theres? im trying to get a little more than 4. 56s in the front should give you between 4"s and 5"s but that depends on a lot things (spring pack thickness, shackle length) 56s in the rear is the same deal as the front between 4 and 5"s.
there ya go