:welcome: to TBN! I cant say for sure on this issue because the 60" mower likely has different mounting locations and linkages thus it would take a bit of modification just to attach it to your tractor. It also would depend on the year too i suppose, is it used or new?
I believe it will fit, because that's the combination I wanted to buy back in the early 90's. The JD dealer wouldn't sell me that combo, saying the 655 lacked the necessary hp for the 60". I bought my 755 as a result.