Great engine one with over 21000 and one with 14000 plus. Take care of the antifreeze run the over head max rpm 2300 . They will pull as well as any peek torque is 1800 RPM just have to think different. Guys try to run at 2600 and yes the RPMS will fall until you get close to peek torque. Parts are getting harder to get for both the tractor and engine.