3/4 ton if i remember right.. i got them probably 5-6 years ago 4 leafs i believe.. they have been sitting out in my parts pile for a good 2 years so i havent looked at them to recently =P they are the 56" long ones not 63" that i know for sure
With my new truck i'll probably be hinging them since i cant flat mount them to the frame and on the axle side i'll be making shackles like these