The Studebaker 'Reo' M series M38/9 to M42 were standard staple for Pak Army.
I have had a ride in one but only on a tarmac road. Great fun and a ride to remember.
The Mercedes 2628 6x6 is fantastic, which one did you drive the 6cylider or the 8. The latest version of the V8 are now producing 580HP at 1800 RPM and 1100Nm of torque at 1100RPM. What a joy this engine must be.
My khaloo had a Studebaker Commander way back in the mid 60's and that was my intro to Studebaker. They also had and still have a Studebaker Champion which is now in DI Khan.