Any MTD 50" zero turn deck will swap over. I have one from a White zero turn under one of my RZT50 mowers now. Red/maroon deck and a yellow Cub, cringe but it does a great job with the lawn. As long as I get those "Attaboys" from the wife when I'm finished with the yard, I don't care much what the mower looks like. The "lawn tractor" decks won't work without some ingenuity and that's a shame because everybody and his brother has a 1050 with a bad engine to almost give away. It is possible though. I was looking at an i1050 I bought for parts the other day and studied the deck a bit. You have to mount some of the zero turn deck goodies and add some extra idlers to route the belt to the back instead of the front, but it's doable. I have a 54" deck under a Cub SLT1554 also with a bad engine that got me to thinking. I'm still undecided whether to rebuild the SV740 on the 1554 or pull the deck and start fabricating a RZT-54. Just a suggestion, do what you want but when you get a good deck rebuilt and ready to go for yours drill some drain holes in the pond area they created on the deck next to the spindle mounts.