How much flex would shackles give me?

[ihatefords]

My 86 K10 truck has a 2 1/2" Rancho Suspension lift and i was wondering if i did a rear shackle flip and a front shackle drop how much more flex will that give me? Also will i have to put shims in the front if i drop the shackles down?

 

[Leper]

My 86 K10 truck has a 2 1/2" Rancho Suspension lift and i was wondering if i did a rear shackle flip and a front shackle drop how much more flex will that give me? Also will i have to put shims in the front if i drop the shackles down?

Quite a bit more in the rear.
How much are you looking to "drop" the front shackle? An extended shackle will let the spring move more, and probably not need shims.

 

[JpEater]

go with greasable bushings too. They make a very big difference on most trucks with good springs or a flip.

 

[wildmouse216]

I did the greasable bushings and new front shackle from offroaddesign and they rock!! Take off your sway bar too.