I don't think you'll find satellite imagery in detail of the base in that time period - maybe aerial photography. The sat imagery from that era wasn't zoomed in and detailed like Google Earth today. You might take some recent photos and superimpose info from the 68-69 era onto the photos. Here's an image posted in this group with some annotations:
You can use Google Earth to get recent views of the base but parts of the US side has gone back to jungle.
There are others also. Good luck.
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