Sounds like some long shackles.
If you end up with 1.5" of pure shackle lift. you're going to have to correct your Caster angle in the front end back to it's origanal setting. Or it will wander like a pig.......
OME 1.5 lift springs will gain the other 1.5 bringing you to 3"
With a set of wedges (installed correctly) to return you to the correct caster angle. Probably 3 degrees or so.
Now you will need to add extended brake lines.
A high steer or cross over kit , to correct the bump steer you will now be dealing with.
And a shock relocation kit.
All of this has been covered many times in previous articles on this site.....Study study study .
There are no really good short cuts to lifting a Zuke (or any other rig ) correctly.
Cause and effect comes in to play here. One thing leads to another. And it all costs money.....
I will tell you the same thing I tell all my shop rats...Save your money. Study what others have done and learn....
Decide exactly what you want your rig to be , do a bunch of research, set a budget , then once ALL THE PARTS ARE SITTING ON YOUR DECK, Start the build.
I call it mapping a build.
In the long run , you will save money , and end up with a well built ride.
The alternative (trying to piece it together) will cost you more money . And possibly destroy your Zuke.....
Good luck....Boxcar...