CCW Carrier transporter

[coachbuilder]

I am Daves kiwi mate who told him about the chassis thickness differences
I know this from personal experience.
In the late 1980s I bought an ex nz ccw that had been a drilling rig in civvy life
the rear 18 inches of the chassis had been removed so I decided to repair it using the rear section from a cckw 352 I was wrecking. To my surprise the rear section from the 352 was approx 2 gauges thinner.I welded it in regardless but the difference was definetely noticeable.
I sold this truck in the early to mid 1990s to a guy in Palmerston North who's name I think was Bevan Udy and I believe he still has it and is restoring it as a ccw. Maybe someone knows this guy and could possibly check the measurements. Even though it was a long time ago I still remember this clearly.Why would the NZ army go to the trouble of modifying CCWs when there were literally hundreds of CCKWs availble at the time.