Hi Keith, these sites will give some insight on these tracked machines.
http://www.industrial.camoplast.com/en-CA/index.htm
http://museebombardier.com/entrance.htm
I work in Kingston Ontario Canada and we still have some Bombardier SW48 plows that we use to plow sidewalks. The model in your post is I think a J5 and if I remember it would be powered by a Chrysler flat six of either 251 or 265 cubic inches.