Word to the wise:
ICM already has 9 other variants of the truck on the market
https://www.scalemates.com/kits/icm-35587-army-kitchen-truck--1527758
Military and civilian, different load beds, with Katyushas, field chapel, with and without crew et.c.
Wait for the kitchen stuff to be released separately or go with your plan?
http://www.seabeecook.com/cookery/cooking/combat_meals.htm
1944 Army Kitchen Truck - The GMC CCKW (some useful bits of information)
I presume you have all the information you need but just in case someone else hasn’t seen this review already or, God forbid, forgotten all about it:
Photos of a “restoration” project mixed with original photos