Hey Oldud,
I think I've got the same 18hp Craftsman that you do. I have the 55 lb weights, and I got them mainly for mowing hills. My Craftsman is about 16 years old, and it does a great job of holding the turf. I recently bought a 16 hp Wheelhorse from the early 80's, and my new (used) NH TC21D , and my Craftsman is still around. I love the way it cuts, and it didn't ever cost me a dime other than belts. I don't have a front blade, but I'd imagine that the tractor would push a bunch of snow with the chain, weights, and blade. Good Luck, I think you should have a great time pushing snow.
Kent