CAN I USE A 42" DECK IN PLACE OF THE CURRENT 46" DECK??

Hello I have a 2004 Murray Select 21 horse 46" 3 blade deck rider. The deck is shot and I was wondering if it would be possible to use a Murray 42" 2 blade deck in its place. I imagine the engineers to keep costs down would make all the mounting points the same.



Any help would be greatly appreciated!!