Thanks for your reply.
Actually, I already have a superb one-previous-owner LHD 2000ie - with a mere 45,000 miles.
I was quite happy to leave things as they are - but the chance of a RHD donor vehicle gave me the chance to consider a conversion. To be honest, I was rather hoping the firewall would be manufactured as either/or LHD/RHD - to save on tooling at the factory. So, the requisite number of openings would be available for both options....?
If, as you suggest, this would need cutting and swopping over between the two vehicles - I think I may just keep it as a “leftie”. The car is in really excellent condition and I wouldn’t want to potentially mess things up..... if, however, it was just a case of changing over various components etc....well, that I would definitely be happy to do.
Maybe I can check on the microfiche for firewall differences?
Thanks again