your jeep doesn't have struts
its leafs and shocks.
if you are bent on keeping the stock suspension stuff you could just do a 2" or 3" body lift. but body lifts suck.
if you opt for a suspension lift, you will have to go with longer shocks otherwise you will bottom out your stock ones and wreck them. it is fairly easy to lift a YJ. but, shocks will be needed with just about every option.
you can go spring over axle (google it
) and that'd net you 6" or so. but will give you drivelline headaches. you can also go more modest, with a 2" by extending your shackles. or you can go with 2.5" or 4" springs which is a very good option as well.
modern or national can install the lift for you but you will pay top dollar.........