I can,t tell you right of the top of my head. The 478 and 549 are the same eng except in cu in but don,t know whether it is bor or stroke that changes it. I am thinking they ran diffrent cranks so the diffrence would be stroke. Go to your local NAPA store find the old counter guy that has been there 30 years they have a book that gives part numbers and what they fit can cross it all out. I am almost certain the farm tractor has a diffrent pin placement, would not work .
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Today's Featured Article - Tractor Hydraulics - The Basics - by Curtis Von Fange. Hydraulics was one of the greatest inventions for helping man compound the work he can do. It’s amazing how a little floor jack can lift tons and tons of weight with just the flick of a handle. What’s even more amazing is that all the principals of hydraulic theory can be wrapped up in such a small package. This same package applies to any hydraulic system from the largest bulldozer to the oldest and smallest tractor. This short series will take a look at the basic layout of a simple hydraul
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