Chris, I changed the title for you.
To read more about the Grant BARV, see
http://anzacsteel.hobbyvista.com/Arm...les/m3ph_2.htm
Regarding the Caterpillar D8 tractor: due to their very low ground pressure it was ideal for beach work, so it was selected as an alternative to the Sherman BARV. It was wadeproofed by the REME. In one of his books Brian Baxter of the REME writes they were also fitted with an armoured body, but other sources state they were only wade proofed but not armoured.
They are referred to as "wade-proofed D8 tractors", never as BARVs. I suggest not using this term as it solely refers to the Sherman BARV.
HTH,
Hanno