Half-track GM trucks

[David_Hayward (RIP)]

I am writing a piece for a 'new' Brit magazine on the half-track Bedfords. I thought I would add some photos and information on the Holden # 13 CMP half-tracks. Can anyone advise in brief please as to how GM-H became involved, and whether they used a Carrier bogie as Vauxhalls did with the QL?

Credit will be given + free mags!