I know this post will be late to get birthday wishes to your dad on his actual birthday, but blame it on my computer - my original post somehow got zapped between hitting the "enter" button and it showing up on the board. The cyber gremlin must have munched it.
I was in Korea too; but about 7 years later than your dad. I was with the 7th Infantry Division at Camp Casey, which is about 30 miles North of Seoul on MSR1, just outside the town of TongDuChon-ni. I was there from Sep 59 - Oct 60, and then again from Sep 1976 to Sep 1977 with the 2d Infantry Division at Camp Howze.
Did a bit of a search around the web and came up with a couple of "Persuaders" your dad may know:
Arthur S. Horton Jr served with the 17th FA BN 8 inch Howitzers 1952-53 Retired Army SGM firstname.lastname@example.org
Daniel L. Lazenberry
Served as quadrantman with the 17th Field Artillery Bn. "B" Battery 1951-1952. email@example.com
From one Vet to another, tell your dad "Happy Birthday and thanks for his service to our Country"