[ACecil]

You need the 42" blade. Any of the narrow frame blades will work. The 100 blades were bolt on, while the newer narrow frames had the quick attach system. From what I've gathered, you can use the quick attach with the 100, as well. You can also use just the blade from a wide frame, but the subframe is different. Here's some pics of my blade and subframe. Hope this helps.