http://www.ebay.co.uk/itm/V8-Land-Range-Rover-Weber-Edelbrock-Carburetor-Kit-V8-Discovery-Defender-Cobra-/192138720509?hash=item2cbc5c34fd
This is the unit that I am considering, but think that my engine is an 8.13:1, so assume that it will make a big difference in performance and not too sure...