To hell with a blade. Get a tractor mounted blower. Trust me on this.
Wish'd it snowed that much..........
No, you don't... Oh, IF you get a blade, try to get one that has the hydraulic swing option... Failing that, one item that can do a better job on gravel is a box-scraper... And those can also work with snow.. I have one - and have used it a LOT over the years..