At least 100 ft of rope was required by the American College of Surgeons ambulance equipment list, and commonly carried. If you're looking for rope - I can recommend Rope Warehouse in Tampa -
http://www.ropewarehouse.com/. The natural manila rope sold at Home Depot, etc. is very low quality. Maybe good for a tug-o-war rope - but nothing like what would've been carried for rescue purposes. I rolled up 50 ft in a buntline coil plus another 50 ft attached with a bowline to the life ring. There's a floor compartment under the stretcher - and it's too small to hold folding stretchers/stair chairs.
The vehicle was known to carry a Porto-Power, without specifics on whether it was the 4 ton and 10 ton model. 4 ton models seem most common on professional car chassis rescue ambulances from what I've seen. However, contemporary news articles stated the 1967 Pinner-Chrysler in nearby Amenia, NY carried a 10-ton model, so that's what I went with. Digging up a period-correct Blackhawk Porto-Power wasn't too hard - but for some reason the box from that timeframe has proven elusive. I've heard from some folks they carried these without a box, and Paul Steinberg told me they made a wood box for the set when he served at West Orange FAS. No evidence to what they had existed - so I found a nice looking one on eBay long enough to hold the set's components. Maybe one day I'll turn up one of the metal boxes...