range rover classic tyres

Hi all,
I am soon to be the proud owner of a 200tdi range rover. Can anyone
tell me the maximum size tyre I can fit without mods to the body
(minor ones OK though), and i don't mind raising the suspension a bit
as I want to put new springs and shocks anyway. I'm hoping to get some
BFG ATs in the right size.

Thanks in advance

Dave