if you really want a good budget lift, jeep grand cherokee the v8 ones the coils lift it about 1.5-2" then run spacers, and for the rear you can do s-10 packs. leave the main leaf from the jeep there and cut they eyes off the s-10 springs and put them on. gives about 2.75-3.25" lift depending on the weight carried and the spring conditions. or you could just get new rustys or skyjacker coils up front and do the s-10 pack out back.
i've heard of people using f-150 front coils for 3-4" lift but their so stiff its not worth it, but if all he needs is lift go for it.
ps dakota leafs give it a lil more lift, mazda and ranger and 2wd yota springs work well also. jeep springs are about 48" long iirc. i'm getting ready to set up a budget lift on my girlfriends lil brothers jeep and i will let you know what all we find out.