Hi Nick,
Army registration number was 32 - 220 as stated
stamped on the chassis is the chassis number 508286 which is part of the VIN number
32-220 109 11/11/1980 - Series 3 6028 Truck, Utility, 3/4 Ton, GS, Cargo 94131209C LBCAP1AF508286 42110 750x16
if you go to the website, registration numbers, click on the 32 range, scroll down to 32 - 220
hope this helps
I'll look at the bulk head for plates for you - didn't think of that the other day
cheers
Scott