[sosilboy]

I have a 84 Sierra and the leaf suspension is flat when the car is unloaded, so as you can see, i need some new springs, i was wanting to put 31's on the car, but i am worryed that with these new springs plus the nessarry 2' body lift, the drive shafts, trans/gear levers, and brake lins may not be long enough.

[steve]

you shouldn't have any issues with the suspension lift affecting any drivetrain stuff. under full flex you might find the front brake lines stretched to the limit. All shafts are long enough for a 2inch spring lift.

you might need a thicker steering biscuit when you do a body lift, and may need to take a look at making sure you can still get the 4wd lever in to gear and it doesn't hit the body.