mono leaf(running one leaf) i do not recommend..
If you want cheap. BUild a 2 link ..
go to suicidedoors.com order a endlink bushin set (2) and weld them to 2 1/2 x 2 1/2 1/4 inch wall steel bars.. and build blocks on the bars.. then use your u bolts and bolt the axle to the bars.
But bag brackets on the bar as well as the frame..
I love this guy's setup if you notice how he reinforced the bag mounts as well as how he raised the gas tank @ at least 2.5 inches.. but notch the cab so you can raise it 3 inches.. so you will never drag the tank
Here is a pic of a 2 link with 3/4 thick still welded to the bars ( THIS IS A TRACK BAR)
I have 2x2 1/4 wall sqaure tubing as my track bar.. it just seems more sturdy then 3/4 plate like is in the picture.
If you have any more questions feel free to ask.
David