i used a 3 inch dropped front axle on my 57, and also took 1 leaf out. gave me a total of 3.4-3.750 total drop in the front.
rides real nice.
out back i kept the leafs on top of the rear, but took 4 of the 7 leafs out, and use 2 inch shackle extensions.
good luck, and please post some pics.
leonard