The blades are different between the two decks. The 42 deck uses two small outer blades and one large center blade. The 44 uses 3 blades that are the same or close to the same size. Also the Center pulley on the 42 deck is completely different than the center pulley on the 44 deck.
44" deck items needed:
The center pulley number you need is: IH-59703-C2 $42.71
Will need PTO belt number : IH-59971-C1 $29.89
You will need three of these blades: 759-3838 $39.69/ea.
The front pulley arms on the mule drive will need to be bent to correctly align the belt with the off center pulley on the 44 deck. You don't want to shred a new belt.
My 44C deck cuts like a dream. I really like it better than the older 42" decks.
If I am wrong on something or have missed something I am sure someone will chime in and correct the problem. Hope all of this helps.
