Arthur, I can't vouch for what is correct, but what I would strongly advise is to check what clearance will exist between radiator and fan before cutting any metal. If they are all pukka Ulster bits then original dims should be fine of course...
On my car I'm pretty sure there's a fair gap between cow horns and rad surround.
On my car I'm pretty sure there's a fair gap between cow horns and rad surround.