I haven't done this but certainly had a good look into it.
I reckon without going too radical some raised springs (taller coils and re-arched leafs) and taller tyres should give you enough clearance. The only problem you will have fitting taller tyres is at the front where they can foul on the front suspension upright (upper balljoint area).
Go have a look under there now, I'll wait........................................................see how it wraps over the tyre. Wheels with more negative offset (see this thread for more info on offset)
can help clearance in this area it just depends how tall you want to go.
The Ford XH Outback ute is a good example of what's practical (& legal). It had the same front suspension as an EB and 6" wide wheels with zero offset running 205/75/15" tyres. (I have heard that 215/75/15" just scrape
in also). These tyres are over 27" tall, stock tyres are around 25.5"
If that's not enough do what Scott Hart has done and have custom modified longer uprights manufactured (good luck getting them engineered for rego though). Both his old EB and the current AU ute run a modified EB upright and front end with 30"x9.5"x15" tyres. He claims that this gives him 14.5" (~37cm) or clearance.
More info here => http://www.trueblueford.com/ScottsAU2xr8ute.html