First timer here. I have a few questions, Is a body lift the same as a spacer lift? and which lift is the easiest/cheapest to buy and install? I just want to be able to put 30" tires on ZJ.

No such thing as a body lift on a Grand Cherokee or a Cherokee, they don't have body on frame construction like an Explorer or 4Runner.

Whateya think, Busted? 2" spacers do the trick?

Welcome to CF!

In looking into the same lift for my upcountry zj, a lot of people recommend a 2in bb(budget boost) and bilstein 2in lift shocks(u get what u pay for with shocks and these ones are kinda pricey and super stiff from what I have heard.) I'm new here so take what I say with a grain of salt and maybe another user and offer some more input.

Oh and from what I have been reading, you should be able to fit 30" tires no problem with proper bump stops and maybe a little trimming