Nice rig!! Make sure to get your ski goggles ready too! All that snow from the blower often winds up in your face without a cab.
I have a nice blower (451) that I am looking forward to using once I find a cab for my 1864. Until then the blade on my tractor is continues to do just fine.
From what I know about the 450 and 451 blowers, the 450 blower works with the small PTO pulley tractors and the 451 blower works with the larger PTO pulley tractors. I'm pretty sure the 2284 has the larger PTO, so the 451 blower would work best for you.