Light weight

Hi Guys

As I said in a previous post (where I got some extremlly useful replies,
thanks) I'm looking at buying a series 2 Land Rover. I've seen a light
weight on E-bay, can people please tell me if I;

a) Need to look for anything on a light weight I don't on an ordinary
Land Rover.

b) What are they like compared to a normal Land Rover, I know some one at
work who says they often have unusal gearing, and wiring.

And lastly c) how easy is it to get parts for them, obviously the wings,
and the wheel arches are differnt than a standard series 2, how difficult
are they to get? how many parts does the vehicle share with a standard
Land Rover?

Thanks, Philip