I have a 855 with a 60" deck on it. I bought a 72" model 297 deck to put on my tractor. It came with the front arms and all the necessary hardware. I put the deck under my tractor and the back fits perfect. The proble is the front arms are to long. They won't fit in the bracket on the tractor. I went to my dealer and they only show one part number for the arms. thie 72" deck is a good 3" further forward then my 60". Something has to be different for this to work on my tractor. Does anyone have a 72" on there 855, if so how long are the front arms. thanks