Randy,
gators probably won't turn your 44 or 50 inch deck on your 1711 into a mulching mower. Yes, they are mulching blades, new they really light up a 44 or 50 inch deck and make it perform, BUT these decks were designed for side discharge. They are not baffled for true mulching and will likely leave clumps and trails of grass if you block off the chute like a true mulching mower.
That said, Gators are one of the best investments you can make in a 44/50 deck. In side discharge mode, you will see a slight reduction in clipping size, but more importantly, your quality of cut will go way up. They have more lift and a better cutting face angle than the stock "swept" cub cadet blades.
Thinking of the Gators as a high performance blade, but not necessarily a true 100% blocked discharge mulcher...still well worth the investment, they're all I run on my decks and I'm VERY picky about deck performance...ask around, these guys know me