Seeing the low-mounted radiator reminded me of another
Indian Pattern odd job: the so-called Indian pattern FATs with "armoured cab":
Note: I don't think it was actually a Cab 13 clad in armour, but rather a makeshift Indian cab. The cab looks too thin for armour plating, it is not rivetted and there is no armour in front of the radiator.
But I am now pretty much convinced these were based on the C291QH chassis. Just compare the level of the front edge of the cab to the top of the radiator on the bare chassis:
The makeshift Indian sheetmetal cab makes sense when out of 480 chassis delivered a number were not converted into the Indian Pattern 4x4 Armoured Truck. Not having any cab components, they must have made up a cab from mostly flat segments, and fitted it with the cargo body normally found on the
Indian Pattern FAT.