Jim,
I believe he was in 2/28 infantry, 1st ID. I will have to check and confirm with him. He did three tours, 1st tour as a Marine, last two in the Army (long story). Here is a picture of the export paperwork but his unit is not on it. Also, here is a link to my original thread on this rifle, was looking to see if anybody else had some documented bringbacks. There was a Vienamese manufactured SKS and a Luger in this same shipment. I have the Luger, Father in law still has the SKS.
https://www.milsurps.com/showthread.php?t=5200