Um, nope, never done it.......... OH wait, you meant leaf springs, thats my specialty.
Im looking for cheap lift and not alot of work lol.
Not to sound like an A**, but look elsewhere.
...... You may be able to get SOME cheap lift, but it WILL be a good bit of work. Not likely you will get both and want to drive it after. If you add a whole 1T spring pack to your main spring you would gain a couple inches, but forget ride quality or flex. So then why have springs.
You may be better off swapping to different springs. I know F150 springs will net some lift in the rear, ~4" roughly and all you have to deal with is the metric vs standard bolts conversion. It gets discussed in my shackle flip thread here
http://www.ifsja.org/forums/vb/showthread.php?t=144373
Not sure what works up front, other than a SOA conversion.
I may do a write-up about bastard packs when I have more time.
Jim