I never ran a 717... They're just a pukie little cut and throw harvester made for a 60 hp tractor. Your 4020 will probably make ratshit out of it. They also have an offset wagon hitch that pulls directly behind the cutterhead which can be rather dangerous on a steep hill. The 3970 should have an extended length, power tounge and the wagon hitch is inline with the tounge... so if you have to work on a grade you can steer the harvester to avoid a jacknife coming down hill...
If you're not bothing with corn just take every other row of knives out of the Deere and you'll run ti fine. It will work the Deere hard but she should sustain a full feedroll opening (slug) for a short time. The longer chop is better for the cows anyway. You only need the short chop for corn.
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Today's Featured Article - The Niagra View Mobile - Powered by a 1959 Ford Tractor - by Mark Massey. In 1959 the Niagara Frontier Transit Inc. of Buffalo, New York designed and built six Viewmobiles for the Niagara Frontier Sightseeing Inc. for use as a sightseeing ride at the Niagara Falls State Park, Niagara Falls, New York, powered by a 1959 Ford 611 Tractor.
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