6 K-8s with Allied Signal TFE731-2A turbofan engine were received in 1994, 6 more K-8s were received in 2003.
27 K-8Ps were received in 2010 and another 12 in 2011.
In short a total of 51 K-8s and K-8Ps were received. However, the same source states that PAF hold 60 K-8s and K-8Ps.
Source:
http://chinese-military-aviation.blogspot.com/p/trainers.html
Where as Wikipedia states that their are 92 K-8s and K-8Ps, interestingly 32 were delivered in 2020.
According to SIPRI arms transfer database, 12 K-8s and 27 K-8Ps were delivered to PAF.
Therefore K-8 and K-8Ps strength in PAF is in between 38 to 92.
If K-8s and K-8Ps strength is 92, then it means that either PAF is grounding all T-37 fleet or number of K-8Ps are assigned somewhere else.