What do i need to do to my 3.9 rover v8 to convert it from efi to a weber carb?
Answers:
Not a huge amount, although I prefer a Holley 350 cfm 4bbl on eidelbrock manifold.
The existing fuel system can be used as long as you keep it a recirculatory type, but a different fuel pressure regulator will be required to match the Holley.
If you are in the UK you will still need to pass the catalyser emissions test, which you will now fail as there will be no engine management control.
A better mod would be to talk to RPI ( http://www.rpiv8.com/homepage.htm. ) as they have some excellent mods available.
PS No personal affiliation to RPI, just a very satisfied customer.