I couldn't exactly say how much more I get since fitting an overdrive to my series two in 2006 - it's definitely more but probably only a few mpg. What is nice though is hearing that petrol engine purring along at much lowere revs than before - if you want to spend more time on road then they...

Speak to the boys at John Craddock Landrover spares mate. I got a new fuel tank for my series two from them last Autumn and it fit no problem. To my knowledge there's no difference between the chassis & fuel tanks on either 2's or 3's!