I would like to inform you that Frans Rynart, from Rynart transports as wrote a book about is 60 years of truck driving experience.
There is a large chapter about the Karachi Convoy (1974)
There is no distributor for this book in UK but you can order it from internet.
Following this link you will find all the info:
toprun.ch/truck/Shop/dvd-books.htm
Ferdy