Thanks for your suggestions airbiscuit,I hope all the details about the loader mount have not lost all interest in this post.I hope the width will be correct after mounting the side mounts to the frame.And I just have to drill new hole locations on the front part of the side mounts.
I measured the width of the frame toward the front,just behind the front axle,where it is easy to measure.It is 12" for the frame but 13-3/4" including the 7/8" thick mounting plates with holes for the loader,welded to each side of the frame.
As for the longer wheel base of my CC 8454,there are no support arms going to the front of the frame from the mid mounts,just rear rails that bolt to the rear axle and also the mid mounts.I will have to modify the rear rails I have,that fit the CC 8354,to fit my CC 8454.
Or buy the correct ones from Cub Cadet.I called them and they are very helpful,more than willing to sell parts and will even make shipping reasonable.
When I called KMW Loaders,they were helpful but not willing to get too detailed about the loaders they made for Cub Cadet/Kioti.I found out they made loaders for allot of the big name tractor manufactures,most of there sales.They also make their own line of loaders to fit larger tractors.All very good quality as far as I can tell.