So the MiG-25's would be making an improvised landing on Port Stanley?
I don't want to get into this too much since the idea of Argentina getting Mig 25s is very far fetched. But if it did happen and a Mig25 did get into trouble over the islands I could see a Mig25 attempting an emergency landing at Port Stanley, better that than ditching it into the sea or drilling it into the side of Mt Kent. A Mirage III, an aircraft well known for long runway requirements, attempted an emergency landing at Port Stanley after being damaged by a Sea Harrier, so the idea isn't totally ludicrous. Unfortunately we'll never know how feasible the idea is because the pilot blew his tanks on approach and the defensive gunners shot him down. So if the idea has any merit at all it can be taken into consideration when fuel loads are being worked out.