[Did you ever progress the AVS Shadow project we spoke about a couple of years ago?]
Well, it's taken me a lot longer than I originally anticipated, but I've collected a whole lot of background materials for it -- and hope to get going again now that I've got some of the tools (from my watchmaking, no less) to work on it.
Since first asking about dimensions, I've purchased the "Can-Am" & "Can-Am Photo History" books, found more online photos, gotten both Marsh models of the Mk1 in 1/43 scale, purchased some Sakatsu pickups, and decided that I may use modified Cox SuperScale tires on custom wheels to get the correct dimensions. If I do that, I'm thinking that covering the tires with silicone to make them one piece may be the way to go.
Also, for a body, the styrene sheet builders have captured my interest. It seems that might be the way to build at least the first version of the model, since the Mk1 was relatively slab-sided & flat.
Thanks for asking!