Nice project and a great start! I've been meaning to look out for a build thread of this kit for some time as I have always had it in the back of my mind to buy one.
I used to drive a "Jimmy" identical to this years ago to shows (and just for the heck of it) around the UK. An absolute joy to drive and it sounded great too and with the benefit of nice syncromesh gearbox...unlike the WW2 British trucks I owned that needed double de-clutching and whacked into gear with a mallet!
The one I drove still had it's original wooden cargo body, a rarity it seems, as nearly all the other GMCs I saw in the UK had metal backs. I was told that the wooden cargo backs were used for transporting ammo...no sparks created on a wooden cargo body. Well, that's what I got told.
The only thing I didn't like was it's original 6 volt electrical system. You could drain the battery just by trying to pump the fuel up from the tank on start up. I used to dunk a glass in the tank and fill up the carb directly to get it going!
I'll post up some photos when I find them!