ok i have a 4in trail master front lift and blocks on my stock leafs in back and i want to get rid of the blocks. if i put chevy 63" springs on it how far do i need to move my mounts to get 4in of lift in the rear. and is this the best thing to do i want to do a sas eventually and would probalby move the mounts again if i do that for 6in of lift

 

 

You can't move the mounts with springs to get more lift. You will get around 2-3" of lift with the chevys. If you go with a longer shackle you will be good.

 

what shackels do u guys use does anyone run webilt shackels and what kind of lift do those give u, are revolving shackels good for on road use?