I'll peruse these & see what it says about cabs, bonnets & weights
FVRDE Spec. 9502 Body, 1 Ton, GS, Cargo, (Austin). 1951
FVRDE Spec. 9503 Body, 1 Ton, GS, Cargo, (RAF), (Austin). 1952
FVRDE Spec. 9513 Truck, 1 Ton, 4x4, GS (Austin) Water Tanker 200 Gallons, FV16008, Air Ministry Version. 1954
FVRDE Spec. 9514 Truck, 1 Ton, 4x4, GS (Austin) Water Tanker 200 Gallons, FV16102. 1952
FVRDE Spec. 9533 Body & Mounting for Truck, 1 Ton, 4x4 GS (Austin) Wireless Light, FV16003. 1953
FVRDE Spec. 9555 Body, 1 Ton, 4x4 GS, (Austin), Cargo, FV16001. 1953
FVRDE Spec. 9574 Body & Mounting for Truck, 1 Ton, 4x4 GS (Austin) Cargo FFW, FV16002. 1953
FVRDE Spec. 9594 Truck, 1 Ton, 4x4 GS, (Austin), Water Tanker, 200 Gallons (War office version FV16009) 1954
FVRDE Spec. 9595 Truck, 1 Ton, 4x4 GS, (Austin), Cargo, FFW, Mk 2, FV16002. 1954
FVRDE Spec. 9673 Body & Mounting for Truck, 1 Ton, GS, Cargo, 4x4, Austin Series III, FV16012. 1960