Kevin,
These trucks, as you are aware, are VERY rare. It would be very helpful for many who study these trucks (like me) if your could document with photos as much as you can, and as I noted in my first post, this is particularly true of everything from the cab to the back of the truck. BTW, I have seen photos of stampings (I think of your truck) which show:
"Type G7113"
Can you tell me where on your truck this stamping is located??
BTW, do you have a copy of the TM 10-1208 parts list for your truck? If not, I can send you the same PDF file that I sent to Theary. It is the first eight pages of the manual, which detail parts unique to these trucks, and also standard parts which are not used. Unfortunately, there are NO pictures.
One last question ( for now). Does your truck have a second set of rear springs? I have seen trucks with them as "overload" springs, and just wondered if your truck has them too.
Oh, man! I am such a G506 nerd!!

Item Co., 23rd Inf. Regt., 2nd Div. WWII HRS
(Retro-Roco)
Bloomington, IL
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1942 Chevy 1-1/2 ton cargo w/ winch
194? Ben Hur water trailer