You have three options - you also need to consider your legal implications if you go for more then 50 mm lift.
Body lift - (I run a 50 mm on my MK LWB) You put spacers between the body and chassis. You willneed to remove the hydulic line between the clutch clave and must cylinder from the mounting point on the fire wall. The gear stick hole needs to be modified as you will find it hard to go into low. Some guys have had to change the filler for the fuel tank.
I done my lift to ensure non of my LPG tank hangs below the chassis
Suspension lift
Spring lift - expensive you replace the springs with after market
Shackle extension i.e superior eng. I belive guiys can have issues with schackle inversions
SOA (sping over axel) has been done lifts the body & chassis. Needs engineering and majoe rework