On May 19 and July 12, 1966, respectively, three black Orions (148669, 149673 and 149678) were handed over to the Republic of China Air Force (RoCAF) (today known as Taiwan). The RoCAF flew them for a very short period in support of a covert CIA program. All CIA P-3 missions were called off as of January 25, 1967.
After all three were returned, two were converted to EP-3B (149669 – PR32 and 149678 – PR-31). As indicated in one of the related posts, the two EP-3B arrived in Japan in 1969, providing much needed relief to the overworked Willies (EC-121M).