You have a McKee 720 if I am not mistaken. Had one for years behind a yery heavy 2wd Nuffield 465.
The hitch pins on the blower would bend from the offset push from the tractor arms so I modified the blower to have the 3 pt arms go between two heavy plates with a pin connecting the blower to the 3 pt arms.
This picture was taken after I sold it and it had rusted considerably since I owned it.
McKee blowers had fans that were too small. The fan could not keep up to the augers rate of feeding the snow to it.
On my Nuffield, the reverse speed was too fast so I imported and installed a special low reverse gear and still the blower could not keep up to the tractor backing into the snow.
John Deere sold the same blower just painted green and can be a source of parts for you.
McKee has been out of business for years.
If you compare the fan diameter and # of blades with more modern blowers you will find larger fans on newer blowers.
With minimal snow, there is a large circulation of air into the fan, out the chute and back into the fan. That is why the snow fog hangs around. Shut the pto off and back up until the blower is almost full and then start the blower up. This will minimize the snow fog.
Sorry if this is not the encouraging opinion any owner of a piece of equipment likes to hear but it is best to recognize its basic limitations so you dont spend a lot of time only to still be frustrated with it's performance.
Everything is relative so having a McKee is a big step up from using a blade or FEL bucket.
Dave
M7040