I realize that this is an old thread but I've just joined and found it. My father flew Yorks before during and after the airlift.
He flew them with 206 before the blockade, during the blockade he flew the record number of missions by any pilot of any nationality (404) sometimes 4 a day, and after the airlift he was posted to 59 sqn on the far east route again, before being selected for the B-29's
As you can see from the attachment record of service, he flew 2000 hours in them