International Harvester 756 Price, Reviews, Specs, Engine Oil Capacity, Weight, Serial Numbers, Attachments, History, Features & Pictures International Harvester 756 Tractor was equipped with an International Harvester C291 gasoline 6-cylinder liquid-cooled 291 ci [4.8 L] engine, which delivers 76.5 hp [57.0 kW] PTO (claimed) power. International Harvester 756 Tractor … [Read more...] about International Harvester 756 Price, Specs, Review