CHECK, I have been having the same concerns and wanted a better front blower than the factory 50" for my BX25, thinking front blower, rear blade. Feedback from Messick's was that the "main concern would be the weight on the BX front hitch. Even though the blower would mount up, the BX hitch is built lighter (82 lbs) vs. the B-series hitch (190 lbs).
BX2750D snowblower - 286 lbs.
B2781A snowblower - 475 lbs."
BX2750D snowblower - 286 lbs.
B2781A snowblower - 475 lbs."