Mike, I wasn't dissing the Green Monster, I remember them very well, with a mixture or fondness, admiration and some hostility. My first posted station had a 6 bay engine room (for the 'regular' fire brigade) and a 6 bay AFS Station which opened into the drill yard. This AFS Station had Green Monsters permanently attached and these Monsters were always brought into use when we broke the red ones. (years before Brigade Reserve Appliances were thought of).
We would put our 'full time' kit aboard the Monster (which in fact meant squeezing it all in wherever it would fit) and it was then 'on the run' as a full time appliance. No radio, no blue lights and a ding -a -ling bell. Turnouts involving uphill runs were timed with a calendar. Getting around roundabouts was a challenge of powerless steering over powerless brakes!
But we never, ever broke a Monster. We'd use them, put them back and get them out again when the red engine needed attention.
Your comment about the Green Monsters being for post nuclear attack were spot on. They were designed for this purpose, not for first response urban firefighting.